CMMG Mk4 S
5.56 NATO or .22 Nosler (new 2018) cal., 16 (5.56 NATO only, new 2018) or 18 in. stainless steel medium taper barrel with A2 compensator, 10 (.22 Nosler) or 30 shot PMAG (5.56 NATO), SST, 6-pos. M4 buttstock, A2 pistol grip, RKM14 KeyMod fr...