05-30-2021, 02:27 PM
I currently have a CMTT build in 5.56 with a carbine buffer tube and mid length gas system. I am mostly done with a 6.5 Grendel upper for it with a 20" Shilen barrel and a JP rifles adjustable gas block rifle length gas tube can i run the Grendel on a carbine length buffer system? I have heard the dwell time can give short stroking issues? What's the best setup to be able to run both uppers on the same lower with the least changes between swaps?