Olympic Arms has been in the AR-15 business since 1982 and is known in the industry and among consumers as an innovator in the field. Olympic Arms is one of the only AR-15 manufacturers that makes every component in-house, ensuring that each and every piece of their rifles meet the rigid specifications of military, government, and law enforcement agency contracts. Their M4 Tactical Carbine is also known as the K3B-M4-A3-TC or the "alphabet gun." The Tactical Carbine starts with a 16" M4 416 Stainless steel barrel with a long-life non-chromed bore, an A2 flash suppressor, and a 1 in 9" twist. The forged flat top has a detachable carry handle with a built-in adjustable sight. The front sight is an elevation-adjustable post with a bayonet lug. The M4 stock has six points of adjustment for comfort and secure hold. This rifle's stock is in very good condition and its metal and bore are in good condition.