A2 buffer w/ spacer in a carbine buffer tube?

[Drifter]

So I was wondering can I put a A2 buffer w/ spacer in a carbine buffer tube? Will it have enough room for the bolt to cycle? Something like this http://www.dpmsinc.com/store/products/?p...7&cat=1719

Or is the h3 buffer essentially the same weight as the a2?

Sorry, but that will not work. It will not lengthen the standard carbine buffer tube because the tube still must thread into the receiver the same way.

It's possible to use a spacer that will enable use of a carbine buffer in a rifle tube, but not vice versa (that I'm aware of).

Stick with carbine buffers in a carbine tube.