Mega Arms billet receivers with Daniel Defense MK18 rail, Trijicon optic, Magpul furniture, and Rainier Arms Raptor Charging Handle. This upper was custom built by the guys at Rainier Arms. Photo by Stickman.
M4 CQBR Block II (MK18). #Suppressors make shooting quieter and more enjoyable. And, in spite of the $200 ATF extortion fee, they are legal. http://beardedhermit.com/three-reasons-suppressors-should-be-legal/