by Bmt85 » Tue Nov 20, 2018 8:52 am
Congrats on the new purchase!
I assume your talking about a Bushmaster factory 20" upper with the carbine length gas system? If so, the only thing I can recommend right off the bat is run as heavy a buffer as you can with it. I wouldn't recommend an extra power spring, though. If your running a carbine buffer tube, then go with a Slash's XH buffer. If your running a rifle buffer tube, then I don't really know, maybe Slash's has something for it. You might even want to add weight to the BCG as well. Search for "Hoot's CCWS", that has info on it.