CMMG Mk4 HT
.22 LR, 5.56 NATO, or .300 AAC Blackout (disc. 2016) cal., GIO or GPO (5.56 NATO only, disc. 2016), 16.1 in. heavy taper chrome moly or stainless steel (disc. 2016) barrel with castellated thread protector, 30 shot Magpul PMAG, SST, M4 butt...