MI-ARP300CRM10/ARP556CRM10
.300 AAC Blackout (disc. 2020) or 5.56 NATO cal., GIO, pistol (.300 AAC, disc. 2020) or carbine length (5.56 NATO) gas system, 8 or 11 1/2 in. barrel, MI Blast Can muzzle device ( 8 in.) or A2 flash hider (11 1/2 in.), low profile gas block...