View Full Version : Turn my paperweight into an 80%'er
thepipes
06-03-2014, 17:25
Hi,
I'm looking for someone in Northern Co to turn my un-touched ar15 lower into and 80%'er so I can finish it. Any ideas out there?
Dan (In Windsor)
kidicarus13
06-03-2014, 18:29
This ought to be good. Subscribed.
SideShow Bob
06-03-2014, 18:53
Can you elaborate?
He wants someone to turn one of these (a raw forging) into an 80% lower.
http://img.tapatalk.com/d/14/06/04/apyjyme6.jpg
Sent from my ass using re-fried beans.
ChunkyMonkey
06-03-2014, 18:55
Who owns a machine shop off Hwy 52 and I-25 again? He did a member's here.
henpecked
06-03-2014, 20:55
I have a shop at 52 and I25 but I did not do anyone's lower.
Give these guys a try [Flower]
http://www.dremel.com/en-us/customerservice/productsupport/wheretobuy/Pages/default.aspx
Give these guys a try [Flower]
http://www.dremel.com/en-us/customerservice/productsupport/wheretobuy/Pages/default.aspx
http://www.highplainscnc.com/
You need a shop shop that can broach the magwell
henpecked
06-04-2014, 08:32
It will be cheaper to buy a 80%. Guy doesn't even say if he has any fixtures with his paper weight.
68Charger
06-04-2014, 09:18
Generally, you get a raw forging if you're going to take it to complete yourself...
http://www.arlower.ray-vin.com/disclaimer.htm
he even has drawings there to make the fixtures: http://arlower.ray-vin.com/ar15/drawings.pdf
Haven't attempted this myself, decided I would be a lot more comfortable when I have a DRO on my mill (need linear scales still, have a Shumatech DRO kit- but it doesn't come with scales.
Generally, you get a raw forging if you're going to take it to complete yourself...
Or if you want a nifty paperweight.
68Charger
06-04-2014, 09:38
Generally, you get a raw forging if you're going to take it to complete yourself...
Or if you want a nifty paperweight.
Why not both? [Coffee]
Well, I guess a completed lower wouldn't fly well at my office (even a raw forging would be risky)- but I'm working from home mostly now...
thepipes
06-05-2014, 12:12
Wow,
Thanks for all the interesting responses. Guess I'll just keep it a paperweight.
Dan
henpecked
06-05-2014, 16:17
figure a shop rate of 65.00 per hour. Unless they already have the fixtures and programs it would be cheaper to buy a 80%
Martinjmpr
06-19-2014, 11:19
FWIW I just bought a cast 80% lower for $44.99, free shipping.
Came in the mail yesterday, looks pretty good. I compared it side - by - side with my DTI AR and couldn't see any noticeable differences (but I didn't mike it or anything either.)
I found that when I did a raw forging it took me about 8 hours to machine the mag well and about 8 hours to machine everything else. I used the instructions from the R Brandes instruction book that 68Charger linked to in post #10. I'm a totally amateur guy with a mill-drill so I imagine professional would be quicker. I pretty much use an 80% lower now if I can. I keep a raw forging around just because I think they are cool.
As an example of what you are doing the raw forging weights 1 pound 9 ounces and a fully machined lower weights 8.2 ounces.
kidicarus13
06-19-2014, 12:52
FWIW I just bought a cast 80% lower for $44.99, free shipping.
Here?
http://www.ar-parts.net/ar-15/80-lower-receiver-graphite-black/ (http://www.ar-parts.net/ar-15/80-lower-receiver-graphite-black/)
Martinjmpr
06-19-2014, 13:42
Here?
http://www.ar-parts.net/ar-15/80-lower-receiver-graphite-black/ (http://www.ar-parts.net/ar-15/80-lower-receiver-graphite-black/)
Yup, that's the one. Sitting on my desk right now. I compared it side by side with my DTI lower on the middie that I built in 2010 and I can't see any differences (well, no differences except the fire control pocket.)
Singlestack
08-26-2014, 20:33
Who owns a machine shop off Hwy 52 and I-25 again? He did a member's here.
Not sure about "who" but Frontier metal specialties is there - wouldn't surprise me a bit if they did it.
Dalendenver
09-19-2014, 01:24
You don't have to broach the magwell in any 80% that I have seen, that is already done. I have finished one with nothing more than a jig, drills, end mill and a drill press. Works great. Look at Quentin Laser for a nice billet and cncguns for the jig and instructions.
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