View Full Version : AR9 - 9MM pistols/sbr
electronman1729
07-18-2018, 16:49
Thinking of a AR Pistol/SBR in 9mm.
What is the consensus on these? Pre-built? or build on from scratch?
Any particular manufactures to go with?
I have done a good bit of R&D and T&E for manufacturers. 6 Factory guns, a few prototypes and 7 that I built myself. IMHO, the Nordic and JP are the closest ready to go, but they still need work. FM Products is another one that makes great systems. Slap their 8.5" on a QC10 lower with a POF trigger and you probably have about the best available right now.
ALL of my personal 9mmARs have the 3.5# POF flat trigger and FM bolts. 9mm blowbacks are a bit violent and they are know to tear up bolts and triggers if they are not properly set-up. The FM bolt has the proper geometry, AR15 style extractor and is properly ramped. The POF has rubber bumpers, fits tight and has locked hammer and trigger pins in a cartridge. It does the best at spreading out the force over the two holes so the hammer pin hole does not get hogged out or break.
Buffers are the other area to be careful. JP flatwire spring (223 for powder puffs, 308 for defense power) with a .308 carbine buffer and a delrin plug cut for overtravel just about 3/8" past the bolt latch. That will allow the bolt latch to last and give the best operation. If you want to spend more, blitzkrieg 9mm hydraulic buffer is the hot ticket. I have both systems and the Blitz is the best, but pricey.
Personally, since no-one has a totally dialed in system, you can do better building today.
If you want to shoot mine, let me know. I have several and you can try suppressed, unsuppressed. Compare them to a KelTec, 16" version, even a 10mm DI PCC. :)
I've got two... one a carbine and the other a pistol. Used the JoeBob Outfitters Spartan 9mm upper n lower with Kaw Valley parts and a hiperfire trigger... so far uber reliable, but I'm just pushing plinking ammo thru them...
kidicarus13
07-18-2018, 20:36
I recommend QC10 from personal experience. Never had an issue with any of my 9mm AR's even though I've read a lot about how unreliable they can be.
electronman1729
07-18-2018, 20:44
What about a Scorpion EVO 9mm over an AR 9mm?
What about a Scorpion EVO 9mm over an AR 9mm?
The Scorpion has not fared as well as the SIG MPX, and both have proprietary (expensive) parts. They both have a higher failure rate among competitors running them hard than the AR9s. If you want a cheap plinker, a KelTec Sub2000 might be worth a look, but the wise advice has been to avoid the Scorpion and MPX at least until they get Gen2s out.
SA Friday
07-20-2018, 17:27
The Scorpion is one of the most reliable of the PCCs. Their mags suck and the triggers get so full of carbon they have to be cleaned every 500-1000 rounds religiously. There is a 3rd gen mag that is much stronger. I haven't had the chance to beat the new mag up yet, but the gun will run ammo that will make a Glock puke. The aftermarket parts for the Scorpion are cheap and so are the OEM parts. They are proprietary, but not even close to expensive.
The MPX is on it's second upgrade of it's second generation. They currently dominate PCC competition, period. They are expensive, but untouchable for flat fast shooting. The current MPXs are more reliable than any of the AR-9s, but you have to change the factory trigger right out of the gate. The first gens sucked.
AR9's break just as much as any other pcc. They are violent direct blow-back guns getting ran on the edge for competition and they break gas keys, extractors, buffers, and triggers. Outside of competition use, you can up the reciprocation mass and go to less complicated buffers and stop a lot of the failures. I've seen so many of the AR-9 lowers with janky specs, I simply won't recommend anything but JP or QC10. They both work.
The Sub-2000 is hella cheap, uber reliable, and fucking awful to shoot. It's like getting punched in the face every trigger pull.
For the MPX and AR-9s, the Hiperfire 24 series triggers dominate hands down.
mattiooo
07-20-2018, 17:32
The Sub-2000 is hella cheap, uber reliable, and fucking awful to shoot. It's like getting punched in the face every trigger pull.
ROFL
Glad to hear about the Scorpion as I just got one.
They currently dominate PCC competition, period.[ROFL2] Max, Tim, Scott, and Todd all shoot AR9s, Brian just went from an MPX to an AR9. So that leaves only Taran in the top 5 of the last two Championships with an MPX. Don't let your hate for me lead you to again give errant advice.
SA Friday
07-22-2018, 22:00
[ROFL2] Max, Tim, Scott, and Todd all shoot AR9s, Brian just went from an MPX to an AR9. So that leaves only Taran in the top 5 of the last two Championships with an MPX. Don't let your hate for me lead you to again give errant advice.
Todd Jarrett shoots an MPX. Took a class with him two weeks ago.
Please go away. You are the problem, not the solution.
Please go away. You are the problem, not the solution.
Darn Bro... You used to be much nicer. What happened?
Now I'm interested to hear what the solution is, and also the problem.
AKA-Spook
08-11-2018, 06:26
https://i.imgur.com/sbcGyPT.jpg
https://i.imgur.com/GzsPXyM.jpg
I like the AR 9mm, I have a CMMG lower that works really well with home built and JSE uppers . I still use a Hahn magazine block in a standard AR lower on occasion.
I was looking at the PTR 9mm, that would an excellent although pricey alternative to the Sig or CZ.
Plus one to the QC10 as well as the MPX. I didn't build my QC10 in 9mm but I really like it all the same.
thedave1164
08-13-2018, 10:06
PSA has fully assembled ones for $599 regularly
I built mine on an New Frontier Armory glock lower, but I have quite a bit more in it than $599
Mine runs like a raped ape, even with crap reloads, but it did take two trips to the range to get it dialed in.
I have mine in a pistol config
https://i.imgur.com/sbcGyPT.jpg
https://i.imgur.com/GzsPXyM.jpg
What is that barrel?
http://pccchampionship.com/
http://pccchampionship.com/
I couldn't find anything there that showed what people were shooting when they won or not. Did find it kind it kinda funny that the logo seems to have an MPX right on it though. I have no skin in this argument, mostly curious about what the top competitors are using.
http://pccchampionship.com/images/logo_main.png
No argument, just thought a few folks might be interested in going to the match. It is a really good time.
By far, more SIGs went down in that match than anything else, and NO Sub2000s went down.
Little Dutch
08-13-2018, 17:51
For what it's worth, I have a 16" PSA upper on a Spikes Glock mag lower that works great.
ETA: Both the upper and lower were pre-assembled. I ditched the trigger that was in it for something a little smoother, but otherwise left it alone.
No argument, just thought a few folks might be interested in going to the match. It is a really good time.
By far, more SIGs went down in that match than anything else, and NO Sub2000s went down.
I watched a few videos of the matches today. Looks pretty cool, life is too busy to actually get out to see it live. The mags they use in the match are insane. How many rounds are they holding in those?
I watched a few videos of the matches today. Looks pretty cool, life is too busy to actually get out to see it live. The mags they use in the match are insane. How many rounds are they holding in those?
Most top guys have backed down to 41s. There are some 47s and 57s as well. Most of those are made by swapping the +2 pad on the 9mm Glock 33s with longer pads from MBX or TTI. There are companies out there making 3D printed couplers and pads, but they don't last long, flex and fail. A 41 in the gun and 23s for reloads is the smart money today. That of course may change as folks figure stuff out. I designed three of the stages for the match, 49, 39 and 17 rounds. There will be several in the high 20 to mid 30 round range.
Colt mag guys are typically running 31s, with some custom made into the 40s that they treat like crystal and only run when needed. One guy on my squad last year had some custom 60s, they did not make it through one stage without some sort of bobble to catastrophic failures.
grubby669
08-13-2018, 21:15
I like the AR 9mm, I have a CMMG lower that works really well with home built and JSE uppers . I still use a Hahn magazine block in a standard AR lower on occasion.
I was looking at the PTR 9mm, that would an excellent although pricey alternative to the Sig or CZ.
I have a CZ and PTR, both are great as long as you know what you are getting.
AKA-Spook
08-14-2018, 04:41
What is that barrel?
its a 4.5 inch I spun up on the lathe
its a 4.5 inch I spun up on the lathe
It's pretty unique looking. Got more pictures of it?
DocMedic
08-20-2018, 15:26
Good ole' MPX... It's a great PCC.. until it's not. I have 2 MPX's and both have seen hard use, the Gen 1 had about 10k through the barrel before it started to choke on me. It has been back to Sig Sauer twice. They replaced the gas system, bolt, extractor, and springs, and it still not 100% like it was pre 10k rounds. The Gen 2 has hiccup'd once or twice but nothing to serious, but it did go down on me hard at the PCC world championships last year which cost me several placements due to the 30 secs of me F* around trying to clear it. With all that said I'm still competing with my MPX, because it is miles ahead any blowback PCC out there, even a fully raced out JP GMR-15 still kicks harder.
HOWEVER I do have a QC10 that I am fiddling with a CMMG guard upper with and I have a GMR-15 on order. Sig is also looking at releasing a Gen 3? MPX or a "PCC" ready MPX that has suppose fixes done to their system. Once they start shipping I'll get in contact with Sig to see what can be done to my Gen 1.
To note: I had a long discussion with TG at RM3G on why he went to the JP GMR-15. Its not that he wanted to, because he does like how the MPX shoots, its the part availability issue that Sig has which I have ran into this issue myself... its seems you need to have 3 MPX's in rotation just so you'll always have one ready for competition while one is with Sig getting fix, and the other being backup when your main goes down [Mad]
^People who actually shoot them know. :)
Lucas Oil PCC, Championship is in the books. It had even less MPXs and Scorpions this year. 1st through 4th were AR15 pattern (including Todd Jarrett in 3rd with a JP). 1 Frankengun, 2 JPs, 1 LimCat. Brian Nelson, in 5th tried the MPX one more time. The next 5 were also AR15 pattern, so 9 of the top 10 ran AR15 pattern 9mm PCCs. Lena was 11th with an MPX (Jerry in 13th also with an AR15 pattern). Less Colt pattern mags and pretty much dominance with Glock mags. Even the handful of guys running the new Ruger used Glock mags.
MBX basepads on ETS mags had a good number of failures. 41 round mags (With Taylor Freelance or TTI pads) got the reliability nod with MBX closely behind with a lot of folks running the 57 rounders. Only saw one 47 round MBX. Still lots of failures related to the Tac-Com parts. We did some T&E on buffers: Standard carbine buffer and spring, .308 buffer and spring, JP SCS and Shooting Innovations buffer system. Of those, the Shooting Innovations had the least movements and smoothest operation. Blitzkreig or Shooting Innovations sure seems to be the top two. Foxtrot Mike bolts, then JP bolts for reliability. Lots of QC10 lowers still in the self-built space.
My Kaw Valley stuffs feel inadequate now...
Thanks for the updates/ info
colorider
08-29-2018, 09:06
I have an ATI Milsport and a Grand Power Stribog. Both are 100% reliable and a kick in the pants to shoot. Very accurate and both are priced great. ATI takes glock mags and the Stribog mags are high quality and inexpensive. 2 good alternatives.
Seems to me that the MPX mostly suffers because of the extra large magazines that people are running in those competitions. I have a gen 1 and a gen 2 and with factory sig magazines I've never had any issues. I've run both gen 1 and gen 2 in a sudo stress test mode in that I've put 500-600 rounds through them in a single session. Using a suppressor, no oil and lots of mag dumps I've never gotten the thing to jam up. I don't really keep track of round count after a certain point, my gen 1 is probably close to that 10k round mark. Hope I don't start seeing the issues mentioned.
I have had the chance to shoot a gen1 in full auto which was pretty cool. The MPX was actually easier to keep on target than the MP5 in full auto we were shooting that day.
Do you guys load rounds differently for your 9mm pistols than you do your 9mm PCC?
Yup. Light bullets with a slower powder in a PCC compared to heavy bullets and a fast powder for pistol.
115s for PCC and 124s for pistol and 165s for revo.
Light bullets over more, slower powder better works with the platform I suppose, and is more efficient.
I've loaded both subs and non for my mpx and mp5s. They all worked well. Going to stick with subs going forward though. For my .45 PPC I just make a standard load.
Do you guys load rounds differently for your 9mm pistols than you do your 9mm PCC?
Yes, with some caveats...it depends on how your system is set up. With 16" barrels, if you plan to run at top speed with light recoil, you want a faster powder. If you have a lot of cyclic mass, slower powder. In both cases, lighter bullets. But if you are running a 4 to 6" barrel, you can load them pretty close to pistol and not have any issues.
Slower powders can still have pressure high enough that you are opening the chamber at pressures that are too high. That is what leads to the case separations and extractor blow-outs. Fast powder, light bullet alleviates that issue for the most part. Accuracy might suffer a little bit since the SDs will be larger, but in most cases, will still be 3 or 4 times more accurate than a pistol. The faster powders also tend to run cleaner than the slower powders in PCCs. With the 90 to 115 grain 9mm bullets, it does help to go to HPs to get a little longer bullet to improve accuracy. Based on how some 9mm PCC barrels are chambered, some 9mm loads that might be great for your pistol won't even chamber in some PCCs. We have seen a lot of bullets left in the lands and an empty case with a powder shower at "Unload and show clear".
mattiooo
09-02-2018, 12:16
Yup. Light bullets with a slower powder in a PCC compared to heavy bullets and a fast powder for pistol.
115s for PCC and 124s for pistol and 165s for revo.
What about for an SBR 9mm with a 7-8 inch barrel?
DireWolf
09-03-2018, 22:15
Yup. Light bullets with a slower powder in a PCC compared to heavy bullets and a fast powder for pistol.
115s for PCC and 124s for pistol and 165s for revo.Given the issues with Xtreme bullets, can you recommend any other (good) current sources for the 165's?
Been having trouble finding much of anything in the way of heavy 9mm jacketed/plated lately....
funkymonkey1111
09-04-2018, 10:33
Lucas Oil PCC, Championship is in the books. It had even less MPXs and Scorpions this year. 1st through 4th were AR15 pattern (including Todd Jarrett in 3rd with a JP). 1 Frankengun, 2 JPs, 1 LimCat. Brian Nelson, in 5th tried the MPX one more time. The next 5 were also AR15 pattern, so 9 of the top 10 ran AR15 pattern 9mm PCCs. Lena was 11th with an MPX (Jerry in 13th also with an AR15 pattern). Less Colt pattern mags and pretty much dominance with Glock mags. Even the handful of guys running the new Ruger used Glock mags.
MBX basepads on ETS mags had a good number of failures. 41 round mags (With Taylor Freelance or TTI pads) got the reliability nod with MBX closely behind with a lot of folks running the 57 rounders. Only saw one 47 round MBX. Still lots of failures related to the Tac-Com parts. We did some T&E on buffers: Standard carbine buffer and spring, .308 buffer and spring, JP SCS and Shooting Innovations buffer system. Of those, the Shooting Innovations had the least movements and smoothest operation. Blitzkreig or Shooting Innovations sure seems to be the top two. Foxtrot Mike bolts, then JP bolts for reliability. Lots of QC10 lowers still in the self-built space.
MarkCO,
Are you seeing anyone using the new(ish) MBX PCCs? Or CKArms PCCs? If so, good or bad?
What about for an SBR 9mm with a 7-8 inch barrel?
Depends on a few factors, but for the most part most are using light bullets.
Powder burn rate is all a feel thing. If you have a muzzle brake on there the schoolhouse solution is a slower powder.
I am lazy and I like simple things. I am shooting 115s with Titegroup in my SBR.
Given the issues with Xtreme bullets, can you recommend any other (good) current sources for the 165's?
Been having trouble finding much of anything in the way of heavy 9mm jacketed/plated lately....
I order bullets in bulk so I haven't needed to order any 165s in a while.
Coated lead might be the answer.
MarkCO,
Are you seeing anyone using the new(ish) MBX PCCs? Or CKArms PCCs? If so, good or bad?
As I understand it, the"7th" Gen MPX is arriving at dealers any day now. I know a few guys that have been running MPXs are really hoping this next gen has the fixes they want. If it does, it will be a winner.
The MBXs had a good track record at the Lucas Oil Match. Did not see any problems related to their guns.
I have not seen any CK Arms. Cheely just left and Bobby is going back to Freedom, so they might be in a state of flux right now.
Coated lead might be the answer. I know a few guys using the 160 grain bullet from Bayou that really like it. http://www.bayoubullets.net/9mm-160-gr-rn-2800-ct-case/
SouthPaw
12-17-2018, 14:07
So I am finally building my PSA Glock 9mm lower that I have had for quite sometime and looking for input on this upper:
https://freedomordnance.com/product/fm-9-9mm-belt-fed-ar15m16-upper-11-elite-model/
All joking aside, I found this guy that looks to be what I am looking for:
https://pro2a-tactical.com/ar-15-uppers/9mm/4-5-inch-9mm-pistol-caliber-chf-stainless-upper-w-can.html?options=cart
Spinta seems to be a popular name that comes up in the AR9 world and I would like to keep it shorter for a PDW package. This also has 1/2x28 threads which would fit the pistons for my cans.
Another option would be this: https://palmettostatearmory.com/psa-gen4-4-9mm-5-lightweight-m-lok-railed-upper-with-bcg-ch-5165450004.html
Am I crazy for wanting a 4"+/- bbl? It would be going on a pistol lower.
Vitesse304
12-17-2018, 14:32
So I am finally building my PSA Glock 9mm lower that I have had for quite sometime and looking for input on this upper:
https://freedomordnance.com/product/fm-9-9mm-belt-fed-ar15m16-upper-11-elite-model/
All joking aside, I found this guy that looks to be what I am looking for:
https://pro2a-tactical.com/ar-15-uppers/9mm/4-5-inch-9mm-pistol-caliber-chf-stainless-upper-w-can.html?options=cart
Spinta seems to be a popular name that comes up in the AR9 world and I would like to keep it shorter for a PDW package. This also has 1/2x28 threads which would fit the pistons for my cans.
Another option would be this: https://palmettostatearmory.com/psa-gen4-4-9mm-5-lightweight-m-lok-railed-upper-with-bcg-ch-5165450004.html
Am I crazy for wanting a 4"+/- bbl? It would be going on a pistol lower.
you're not crazy for wanting shorter. For a caliber like 9mm, shorter is better! The only thing I would caution you on is that when PSA first came out with the 9mm glock lowers, they said it could only be used with a PSA upper. Not sure if that's still the case, but you might run into fitment issues.
SouthPaw
12-17-2018, 16:03
you're not crazy for wanting shorter. For a caliber like 9mm, shorter is better! The only thing I would caution you on is that when PSA first came out with the 9mm glock lowers, they said it could only be used with a PSA upper. Not sure if that's still the case, but you might run into fitment issues.
I remember reading/hearing about that as well. I purchased it in 7/17 so I wonder if it was fixed by then. PSA has had their complete lowers on sale for close to $200 if memory serves me right so I am hoping they might have it around for Xmas.
So I am finally building my PSA Glock 9mm lower that I have had for quite sometime and looking for input on this upper:
https://freedomordnance.com/product/fm-9-9mm-belt-fed-ar15m16-upper-11-elite-model/
Actually...they have a fairly good reputation among those with full auto lowers. While I do not have the expensive lower...I did get one of these uppers to play with with a binary trigger. Ran smooth. About 100 rounds thru it in a single sitting and not a single problem.
I dont think you're crazy...4.5" kaw valley barrel....
76857
So I am finally building my PSA Glock 9mm lower that I have had for quite sometime and looking for input on this upper:
https://freedomordnance.com/product/fm-9-9mm-belt-fed-ar15m16-upper-11-elite-model/
More fun than drowning kittens.
I also have a 5.5 inch barrel upper. Huge fun but being an M-16 lower it uses Colt mags. I have yet to try a Glock mag adaptor. The Endo Mag kits look like a solid option, even more so if you use a CMMG Guard upper.
https://i.imgur.com/DHsytLo.jpg
https://i.imgur.com/es2EiIj.jpg
electronman1729
12-22-2018, 01:18
Well ended up getting an EVO and Ar9
76885
76886
TEAMRICO
12-22-2018, 23:18
Is that for Glock Mags or Colt/Uzi stick types?
I just picked up a Spikes Tactical ST9 lower to start my build.
electronman1729
12-23-2018, 00:52
glock
Scanker19
05-25-2019, 08:19
So far I"m not impressed by the Spikes lower. That LRBHO is causing a bunch of issues. It likes to hold open on the second to last round and the last round. theres some weird interference between the upper and the lever of the LRBHO on the lower.
electronman1729
05-26-2019, 06:47
So far I"m not impressed by the Spikes lower. That LRBHO is causing a bunch of issues. It likes to hold open on the second to last round and the last round. theres some weird interference between the upper and the lever of the LRBHO on the lower.
What type of upper, bolt, and what is your buffer weight?
Scanker19
05-26-2019, 11:34
Regular Mil-Spec AR upper. The bolt is just a normal AR9 bolt. Buffer is 5.5. The magazine trip was rubbing on the upper in a weird way. I might work better with an AR9 upper and not a regular mil spec upper.
But to quote Buford Tannen, “I done shot that horse!”
I’m going to just go with a non hold open. Less parts to break. And if it’s good enough for the MP5 and AK then who am I to say I need one.
Great-Kazoo
05-26-2019, 13:16
Regular Mil-Spec AR upper. The bolt is just a normal AR9 bolt. Buffer is 5.5. The magazine trip was rubbing on the upper in a weird way. I might work better with an AR9 upper and not a regular mil spec upper.
But to quote Buford Tannen, ?I done shot that horse!?
I?m going to just go with a non hold open. Less parts to break. And if it?s good enough for the MP5 and AK then who am I to say I need one.
Remove the LRBHO from the lower and call it good. Regarding the upper, i built 2 using basic A-3 uppers, w/out any issues. After installing the taccom 9mm ramp. That was due to the 2 9mm lowers i had, not having a "ramp" on them, like the spikes, QC10 and a few others.
The only LRBHO i've seen actually work 100% is on the ..................Ruger PC 9 take down
I got the Joe Bob Outfitters Spartan 9mm lower n upper and have a functioning LRBHO...seems like there are quite a few different specs on 9mm AR that have varying results
electronman1729
05-26-2019, 14:38
Regular Mil-Spec AR upper. The bolt is just a normal AR9 bolt. Buffer is 5.5. The magazine trip was rubbing on the upper in a weird way. I might work better with an AR9 upper and not a regular mil spec upper.
But to quote Buford Tannen, “I done shot that horse!”
I’m going to just go with a non hold open. Less parts to break. And if it’s good enough for the MP5 and AK then who am I to say I need one.
I kept everything spikes. Something with the bolt and upper may be dragging. I'm using a configurable buffer with a standard carbine spring.
I would try a heaver buffer.
Resurrecting this thread to find out if anyone has had any experience with the newest generation of Sig MPX?s? In particular I?m wondering about how gassy they are when suppressed compared to some of the other stuff out there now( scorpions, blow-back AR9?s etc) wife is wanting to get a pdw style pistol and so far the mpx is the forerunner after talking myself away from the noveske space invader. Love Noveske, but tough price tag to swallow for an AR9...
Any advice would be awesome! Thank you everyone!
I have a first gen MPX. Don't hold your breath on any promises they make. Severely disappointed with Sig's customer service.
I bought the 8" version with the understanding that they would be releasing the other length systems and that the barrels and or complete uppers would be available later. So...gen 2 came and went with no uppers or barrels available. We are now effectively on gen 3 and last I looked at their website and last I contacted them there were still none available.
Sig makes a good product. They also make a lot of promises that they don't keep.
As for the question on gas...I never felt mine was any more gassy than just about any other similar 9mm AR style system. Cannot answer about the newer models.
I have two blowback AR9s that I run suppressed with 8" barrels. Relatively fast, clean powders keep them pretty clean. We have shot them inside the range sheds at Clear Creek from the back wall with just one window open for 30 rounds just to see what it would be like and it was fine. Less obnoxious than the suppressed .223 doing the same thing.
TresMonos
03-24-2020, 16:25
QuarterCircle 10 makes awesome lowers and uppers...this is my AR9 build.
https://i.imgflip.com/1vw7wj.jpg
QuarterCircle 10 makes awesome lowers and uppers...this is my AR9 build.
https://i.imgflip.com/1vw7wj.jpg
I want one of their MP5 mag lower and upper sets.
Looks interesting!!! I’ve read a fair amount about the different magazine formats. It seems the consensus is the Glock magazine variations edge out the colt magazine variations by a bit reliability wise? Haven’t seen anything on the mp5 mag variations but I like the look a lot! Have you had any reliability/feeding issues with the colt magazine variant you have?
Thinking hard about just ordering one of the mp5 mag receiver sets!
Great-Kazoo
03-25-2020, 23:47
Looks interesting!!! I’ve read a fair amount about the different magazine formats. It seems the consensus is the Glock magazine variations edge out the colt magazine variations by a bit reliability wise? Haven’t seen anything on the mp5 mag variations but I like the look a lot! Have you had any reliability/feeding issues with the colt magazine variant you have?
Thinking hard about just ordering one of the mp5 mag receiver sets!
. While the MP5 mag style looks good, you CO guys are stuck with less than 16 round mags.
The colts have had issues, running the magwell insert, while the dedicated lower works, like the MP5 style greater than 15 rd mags are not available in CO . Legally ;)
The glock style offers a more versatile mag capacity. .
OneGuy67
03-26-2020, 09:50
Looks interesting!!! I’ve read a fair amount about the different magazine formats. It seems the consensus is the Glock magazine variations edge out the colt magazine variations by a bit reliability wise? Haven’t seen anything on the mp5 mag variations but I like the look a lot! Have you had any reliability/feeding issues with the colt magazine variant you have?
I have had some feeding issues with my Colt mag lower AR9. My Glock mag lower AR9's, not as much. It could be due to using aftermarket Colt mags, but I will have to do some more range time/experimenting with the Colt to get it to feed and cycle reliably.
Linkless
04-17-2020, 22:39
I've had no feeding issues with the factory Colt Mag or the ASC 32rd mags on my Carbine or SBR (both Colt). I haven't shot that much out of the new ones but they have seen 124JHP handloads, FMJ handloads in 115 and 124 as was as FMJ factory loads. I'll be testing some 147 this weekend in the hopes of having subsonic rounds out of the 16" barrel for when my supressor gets to come home. I did have a Colt Carbine quite a while ago and didn't have any issues with the factory mags with 1000s of rounds through it.
I did buy 2 AR Stoner 10 round mags from Midway...they suck.
I've had no feeding issues with the factory Colt Mag or the ASC 32rd mags on my Carbine or SBR (both Colt). I haven't shot that much out of the new ones but they have seen 124JHP handloads, FMJ handloads in 115 and 124 as was as FMJ factory loads. I'll be testing some 147 this weekend in the hopes of having subsonic rounds out of the 16" barrel for when my supressor gets to come home. I did have a Colt Carbine quite a while ago and didn't have any issues with the factory mags with 1000s of rounds through it.
I did buy 2 AR Stoner 10 round mags from Midway...they suck.
Thanks for the info, are they ok for range mags?
TEAMRICO
05-02-2020, 13:15
I have a ProMag stick and it works like a charm. If you get ahold of one of those is would recommend it. Yeah ProMag is hit or miss but this is a hit!
electronman1729
05-02-2020, 21:41
AR9
Spike Upper, Lower, and Bolt
8.3" Barrel, Midwest hand guard, CMC trigger
https://i.imgur.com/eokxHrCl.jpg
Linkless
06-01-2020, 20:21
Thanks for the info, are they ok for range mags?
Sorry, just saw this. No, they aren't OK for anything. The last round would try to feed vertically on one of them every time. The second one started doing it after a couple of successful runs.
ASC makes 32, 20 and 10. I've used the 32 and 20 quite a bit now and have had zero issues. I will likely order some 10s at some point.
Linkless
06-01-2020, 20:23
81732
Colt LE6991 with AAC Ti-Rant 45m in short configuration. Only modification is Armaspec Stealth Spring.
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