After spending all evening scrubbing funk out of suppressed 10.5" guns, I think I’m ready to consider a piston. The only one that is interesting to me is the MRP Piston, and I already own an MRP CQB that I’m completely happy with.
Has anyone run an MRP 12.5" piston in heavy use, both suppressed and unsuppressed? I’m not really interested in data on the 16", since I already have a 16" MRP.