Gas length AR-15 mix-up

[Tactical30]

I was wondering on AR-15's what is the best way to set up a gas system?

<span style="text-decoration: underline">I currently have a</span>:
20" bbl setup w/ rifle length gas system (AR carrier: .223)
w/ Magpul PRS stock (rifle length)
18" bbl setup w/ mid-length gas system (M16 carrier: 6.5mm)
w/ Magpul PRS stock (rifle length)
16" bbl setup w/ carbine length system (AR carrier: .223)
w/ Magpul CTR stock (carbine length)
* All have Low Profile gas blocks under Larue rails

I am wondering cuz I want to put a A2 buttstock assy. on my Carbine but will the rifle length buffer assembly work with the carbine length gas system? Im also using a M16 carrier on it now. Whats the difference? I had never had any problems with the way im running it now but want to change the CTR stock and I have a spare A2 assembly I want to put on it but dont know if it will work right with the Carbine (7") gas system.

 

[Scottmilk9]

Re: Gas length AR-15 mix-up

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: longrange30</div><div class="ubbcode-body">I was wondering on AR-15's what is the best way to set up a gas system?


I am wondering cuz I want to put a A2 buttstock assy. on my Carbine but will the rifle length buffer assembly work with the carbine length gas system? Im also using a M16 carrier on it now. Whats the difference? I had never had any problems with the way im running it now but want to change the CTR stock and I have a spare A2 assembly I want to put on it but dont know if it will work right with the Carbine (7") gas system. </div></div>

You can put the A2 stock on as long as you use the longer(rifle) buffer and spring. It shouldn't effect the functionality of the rifle. Most use a M16 carrier for the extra weight to help cycle better.

 

[steelcomp]

Re: Gas length AR-15 mix-up

+1.
Just FYI...on an AR15, the carbine length gas system was really designed for a 12" barrel length. If you have the choice, run a mid length gas system on a 16" barrel. The rifle will run much smoother and it's easier on parts.

 

[OFIS]

Re: Gas length AR-15 mix-up

i have a 16" mid length, runs like a top.

 

[marduk185]

Re: Gas length AR-15 mix-up

i run a carbine barrel and gas block under a full length float tube and have ran both carbine collapsible stocks/buffers as well as full length stock with buffer with zero notice of any change in performance.

 

[exhogflyer]

Re: Gas length AR-15 mix-up

On an AR the gas system length has nothing to do with what buffer system you run.Collapsible length= shorter spring/buffer, full length = full length buffer/spring.Buffer weights are "tuned" to help smoother cycling.That said, you want to use the LONGEST gas system you have room for.They will be smoother and less finicky to powder charges/ burning speed.Try always to use at least a mid length gas system, and rifle length is better yet.

 

[gunnut284]

Re: Gas length AR-15 mix-up

Buffer doesn't effect gas system.
<16" = carbine gas; 14-18" = mid gas; 17"+ = rifle gas.

 

[AK10mm]

Re: Gas length AR-15 mix-up

There is a company out there that makes a gas tube that looks like a curly-q,it mimics a longer gas tube by wrapping around the barrel to give extra length.Saw one in a catalog a couple of years ago.Anybody else recall seeing one of these?