This is a top of the line Colt competition rifle, get it while you still can!!! 18"match grade stainless steel custom fluted barrel,6 groove button rifling, 1/8 rh twist. 223 Wylde chamber accepts sammi-spec and NATO-stamped 5.56 X 45mm ammo. Rifle length gas system, adjustable 'tool-less' Gas block. Custom Colt 15"floating hand guard with accessory rail. Precision fit Forged Upper and Lower stamped on upper receiver. Flat top receiver with Picatinny Rail. Proofed and Magnetic Particle (MP) Inspected bolt Badger Ordinance extended Tactical Latch on Colt Competition charging handle. Geissele 3.5 lb. Super 3 Gun (S3G) Trigger Magpul trigger guard, Magpul grip, Magpul magazine included (1 30 rd.)