Tactical contour (SPR without Ops Inc. notch), CLE Match chamber, from a Bartlein 18.1”, 1:7.7” twist, 4 groove, with intermediate gas system, 5/8-24 muzzle threads, bead blasted finish. Vltor MUR upper, BCM MCMR-15 with two aluminum rails and QD sling mount, and BCM gas block. BCM BCG with bolt...