Rock river arms LAR-15M Mid-Length A4 .450 Bushmaster
.450 Bushmaster cal., GIO, mid-length gas system, 16 in. CM (new 2021) or SS cryo treated (disc. 2022) barrel w/low profile gas block, RRA Operator brake, two-stage trigger, winter trigger guard, RRA Operator CAR stock, forged RRA LAR-15M m...