CMMG Mk4 RCE
5.56 NATO, .300 AAC Blackout, or .22 Nosler (new 2018) cal., GIO, 16 (5.56 NATO or .300 AAC Blackout only) or 18 (.22 Nosler cal. only) in. Nitride (16 in. barrel only) or stainless steel medium taper profile barrel with CMMG SV brake, 30 s...