CMMG Mk4LE
9mm Para., .22 LR, 5.56 NATO, or .300 AAC Blackout cal., GIO, 16 in. WASP treated chrome-moly steel M4 profile barrel or M300 multi-role profile barrel (.300 AAC Blackout cal. only) with A2 compensator, 30 shot, SST, "F" marked front sight...