Thanks for the feedback.
I've used the setup before and it felt about the same as a 20"/rifle gas setup. I was curiuos what those of you with more expertise on the subject thought.
When I went to a collapsable type stock with the carbine buffer system and standard carbine buffer I could definitely feel a bit of a 'thump' that I assumed was the buffer hitting the back of the buffer tube.
For now, I've gone back to both of my ARs in the generic A2 and A3 rifle mode, 20" bbl, A2 stocks, rifle gas.
