Make no mind that I want nothing to do with a AR15 piston kit. When I speak of reliability of the piston system I only mean Hk,LWRC... and a custom builder I know who only makes piston systems. This is from my experience and is my opinion from that experience. I will not include Ruger because I have yet to put one through the mill.
" The strongest reason for the people to retain the right to
keep and bear arms is, as a last resort, to protect
themselves against tyranny in Government...." - Thomas Jefferson