JP enterprises captive buffer spring question

[HoosierQ]

I have a nice little budget AR carbine. The older SW Sport...no dust cover etc. I'd like to put a new upper on it with a dust cover and either a mid or rifle length gas tube and maybe an 18 inch bbl.

Can if get one of the captive, one piece buffer assemblies that will fit in the carbine but handle the lower pressure of the longer gas tube relieably?

Been watching In Range do this WWSD (what would Stoner do) thing and I've learned a great deal. I like Ian's rifle a lot but I don't want to bother with getting a new lower because the one I have is nice enough. Thanks.

 

[Varminterror]

Can if get one of the captive, one piece buffer assemblies that will fit in the carbine but handle the lower pressure of the longer gas tube relieably?

Yes.

 

[greyling22]

Yes, but a little grease on the standard spring helps a lot. You might also look at the armaspec stealth buffer. It's like the jp, but half price.

 

[Skylerbone]

My wife’s 18” rifle length runs fine with a carbine buffer and carbine extension.

 

[bullzeye8]

It shouldn't be an issue but JP makes spring sets so you can change out the spring to a lighter one if necessary.