[ARCHIVED THREAD] - AR buffer question.

Posted: 2/5/2010 7:34:40 PM EDT

Is there a difference in the buffer for a rifle upper as opposed to a carbine? I bought a 20" upper, and put it on my RRA lower. It cycles fine with my 16" upper, but short strokes on the 20" upper.

Thanks.

Les

Posted: 2/5/2010 7:56:57 PM EDT

[#1]

yes

Posted: 2/5/2010 8:02:47 PM EDT

[#2]

I know when I switched out my M4 collapsible stock for the A2 style full butt-stock not only did I need a new buffer tube, but the spring and buffer were different.

Posted: 2/5/2010 8:08:45 PM EDT

[#3]

I still have the collapseable stock on it.

Posted: 2/5/2010 8:24:50 PM EDT

[#4]

Any upper should work fine on what ever lower with either a carbine or fixed standard stock assembly.Upper configuration has nothing to do with buffer selection the type of stock used dictates that.Short stroking can be a gas problem check the carrier key to make sure its not loose and gas tube of the 20" upper.As long as you dont use a carbine buffer in a standard rifle extension or a standard buffer in a carbine extension everything should be fine.My guess is the problem lies in the 20" upper.I believe the Canadien C7 rifle use a telestock with a 20" upper.

Posted: 2/5/2010 8:29:26 PM EDT

[#5]

Yeah, what they said. The buffer and spring are matched to the length of the buffer tube, not the barrel or gas tube length.

Posted: 2/5/2010 8:53:05 PM EDT

[#6]

Thanks for the replies.

[ARCHIVED THREAD] - AR buffer question.

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[ARCHIVED THREAD] - AR buffer question.

[ARCHIVED THREAD] - AR buffer question.