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Sometimes fun has a hard time functioning. Everything can be made to run it seems. Give it a go, the worst you do is giggle when you use it...Originally Posted by RonMexico
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A guy at a machine gun shoot a few years back had a G3 with an 8 or 9 inch barrel. shot full auto just fine. Didn't stabilize bullets very well, left a ton of keyholes. PTR sold a pistol for awhile too. Never saw a AR 10 style pistol. DO IT .
Kinda like the Sig P716?
whether or not it would cycle would depend on a number of factors- given a fixed barrel length, factors for the gun itself would include: gas port location and size, BCG weight, buffer weight, chamber dimensions, and overall friction and sealing parameters.
Besides the gun factors, there would be ammo parameters such as: bullet weight, powder charge, powder burning speed, OAL, case volume, etc...
Could it be made to cycle? Absolutely! would it cycle with a variety of ammo? If proper choices were made on the barrel, then it's probably it would cycle between 140-180gr ammo without too much issues- as barrel length decreases, your margin for other parameters shrinks... build it for a particular ammo selection, and you can make it very reliable- how far you want to deviate from that will be the challenge with a pistol build.
Of course, you could just over-gas it, and pound components at one end of the spectrum... but it would cycle (until something breaks)
Welcome to the wonderful world of engineering, everything becomes some level of compromise...
ΜΟΛΩΝ ΛΑΒΕ, we are the III%, CIP2, and some other catchphrase meant to aggravate progreSSives who are hell bent on taking rights away...
Specifically, the CQB 12.5"
They also released a 14.5 "Carbine."
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Kinda but without the excessive price tag.
Thanks for the write up. I agree that you can make just about anything run. If this pipe dream happens than I would like it to function with low cost surplus or cheap hunting ammo, basically 147-155gr but I will try a few 168s just for kicksWelcome to the wonderful world of engineering, everything becomes some level of compromise...
somebody has done it:
My point is, you can't just cut down a rifle gas-length barrel, it won't have enough gas pressure to cycle- AR pistol barrels have the gas hole further back than carbines.
As I understand it, AR 308 barrels typically don't come with less than mid-length gas port... so carbine length may work for a 10.5" barrel, depending on gas port size. Will probably have to order from a custom barrel shop, unless you can find one undrilled and have it cut and drilled by Bert.
Last edited by 68Charger; 04-07-2014 at 07:29.
ΜΟΛΩΝ ΛΑΒΕ, we are the III%, CIP2, and some other catchphrase meant to aggravate progreSSives who are hell bent on taking rights away...
Like I posted on another forum that posted that letter: It would only be news if the letter said it wasn't the ugliest thing ever put onto an AR15.
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Fished my ar10 pistol. Overall I am impressed and looking forward to shooting it soon. BTW I used a cmmg 12.5" barrel
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