Mr556 bolt carrier
Hy35 vs hx35
The MR556 is the semi-auto-only civilian version of the HK 416. The HK 416 is essentially a gas piston M4. For those not familiar, the standard AR-15 is direct gas impingement (DI) which means that combustion gases during firing are fed back into the bolt carrier to unlock the breech and cycle the action.
Nitrided or NiB coated bolt carrier group available; Radian Raptor ambidextrous charging handle (DPMS pattern only) Standard caliber options include 22-250, 243, 7MM-08, 6.5 Creedmoor, .308 win, .338 Federal (LEFT HAND AVAILABLE IN STAG PARTS) CZ Scorpion Evo $2250 SBR configuration shown . $2250 Built on SWS provided CZ Scorpion Evo Pistol or ...