[ARCHIVED THREAD] - AR15 Buffer and Spring

Posted: 10/21/2015 1:27:28 PM EDT

Newly registered user to the forum here. I've followed the forum for a few years, getting info here and there, but I have never needed to ask a question. So, here is it. I currently have an Olympic Arms K16QR that has a mid-length gas system. I would like to swap my upper out to a carbine length gas upper, probably a Bushmaster. With my buffer being a standard A2 rifle buffer at 5.2 oz, I assume (I could be wrong, let me know if I am) I can continue to use the same buffer. As far as the spring goes, I'm not sure if I can still use the one I have. Would I need a heavier spring to deal with the added recoil going from a mid to carbine gas system upper? My biggest concern is reliable cycling, but less felt recoil would be an added, but unneeded perk. Thank you for any help I can get. Happy Shooting!

Posted: 10/21/2015 2:47:44 PM EDT

[#1]

It'll be just fine the way it is.

Posted: 10/21/2015 2:54:49 PM EDT

[#2]

Excellent! That is sort of what I figured, but I thought 2 or more heads would be better than one. Especially if I were missing something. Thanks again!

Posted: 10/21/2015 3:17:34 PM EDT

[#3]

The question remains - what buffer tube do you have now? The assumption is you have a rifle tube, buffer and spring, and possibly a fixed rifle stock. If that is true, the carbine-gas upper will shoot fine in that lower.

Posted: 10/21/2015 4:40:24 PM EDT

[#4]

As long as the correct tube, spring, and buffer are used it doesn't matter what kind of upper is attached

Posted: 10/21/2015 5:06:26 PM EDT

[#5]

Quote History

Quoted:

As long as the correct tube, spring, and buffer are used it doesn't matter what kind of upper is attached

View Quote

Yep. You have a rifle receiver extension (buffer tube) so the rifle buffer and spring are correct no matter which upper you use.

[ARCHIVED THREAD] - AR15 Buffer and Spring

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[ARCHIVED THREAD] - AR15 Buffer and Spring

[ARCHIVED THREAD] - AR15 Buffer and Spring