BF15 TIER 2R
5.56 NATO cal., 16 1/2 in. M4 barrel with A2 birdcage flash hider, optics ready, 6-pos. collapsible stock with Mil-Spec size buffer tube, low profile gas block, 13 1/2 in. modular rail system with full-length top Picatinny rail, two 3 in. a...