Caliber: 5.56 NATO. Capacity: One 30-round magazine. Barrel: 11.5" and 16", 1:7" RH twist, alloy steel, button-broached, chrome-plated, A2-style flash hider. Stock: 6-position, collapsible. Sights: Low-profile, folding metal front and rear sights. Full-length 12 o’clock Picatinny rail with five built-in QD points. Weight: 5.6 lbs. (11.5"); 6.25 lbs. (16"). Trigger: FN Combat Trigger, 4.75-7.75 lbs. Overall Length: 27.5-30.75 in. (11.5"); 31.9-35.2" (16") Features: Law enforcement models have a lightweight design, extended handguards and sight-ready configuration. Multiple M-LOK and quick-detach (QD) points, chrome-lined barrel with pinned low-profile gas block, MPI-inspected and marked M16-style bolt carrier. Free-floated handguard (10.5" long with 11.5" barrel, or 15" long with 16" barrel.)