300 blackout. It has a silencerco lowered with ambi bolt release, 8”barrel, silencerco BCG, aero hand guard, sba3 brace, timney trigger, bcm charging handle, and vortex strike fire sight. New magpul vertical foregrip. New BCM gunfight rear grip. 2 30 round mags and a 40 round mag. Carrying case. Only fired 30 rounds out of it and cleaned. 1400 OBO (OR BEST OFFER)