"The 1911 is a single-action, semi-automatic, magazine-fed, recoil-operated pistol chambered for the .45 ACP cartridge. It served as the standard-issue sidearm for the United States Armed Forces from 1911 to 1986. It was first used in later stages of the Philippine?American War, and was widely used in World War I, World War II, the Korean War, and the Vietnam War. The pistol's formal designation as of 1940 was Automatic Pistol, Caliber .45, M1911 for the original model of 1911 or Automatic Pistol, Caliber .45, M1911A1 for the M1911A1, adopted in 1924. The designation changed to Pistol, Caliber .45, Automatic, M1911A1 in the Vietnam War era. KWC are known for making quality full metal guns in the airsoft market and have a good reputation for their build quality. They have been around long enough to know what airsofters desire in an airsoft gun. The 1911 platform is popular and common that its usage is well known and practiced by many players and easy to find holsters for and the pistol is all metal for great weight and feel. This replica is well put together and can compete with a lot of GBB pistols on the market to date, and all the control latches and such are crisp and secure. the difference with this one is that it features a tactical under rail for all your accessory needs such as laser pointers or flash lights. Please note this does not take standard 6mm BB pellets, you have to use the 4.5mm BB pellets to be able to use this airsoft gun! It also uses CO2 to propel the pellets so please refrain from using any other gases. Items included: 1x KWC M1911 A1 TAC CO2 Blowback Version 4.5mm Air Gun 1x Allen Key 1x Manual 1x Pack of 4.5MM Steel BB Pellets "