Caliber: 5.56 NATO. Mil-Spec-class rifle with included sling and Warner & Swasey red-dot sight. ALG V3X hand guard, M-LOK slots. B5 Systems SOPMOD stock, Mil-Spec six-position buffer tube H1 buffer. ALG Defense Advanced Combat Trigger. Barrel: MIL-B-11595E chrome-moly steel, hard-chrome plating. Geissele 17–4 PH stainless steel gas block, Geissele extended mid-length gas tube, A2 flash hider. Warner & Swasey 3-MOA red-dot sight sits 1.54" above the bore’s centerline.