Eight years after Glocks original unveiling of the G21 the G21 Gen 3 was introduced. Chambered in 45 ACP with a polymer frame and a 10 plus 1 capacity in a staggered-column magazine the Glock 21 Gen 3 is a semi-automatic handgun manufactured primarily for the American market. It featured a built-in accessory rail known as the Universal Glock rail thumb rests on both sides of the frame and finger grooves on the front of the grip which also had checkering on the front- and backstraps along with textured sides. Later versions of the G21 Gen 3 also featured a modified extractor that doubled as a loaded chamber indicator an enlarged locking block and an extra ross pin. DetailsRemarkable for its accuracy and light recoil the GLOCK 21SF delivers the legendary stopping power of the .45 AUTO round with 10 plus one round magazine capacity. Countless law enforcement units swear by the G21SF pistol and thats why this powerful lightweight all climate workhorse is standard issue from the North to South Poles. The SF model reduces the circumference of the receiver at the rear or back strap offering increased comfort and control-especially for shooters with smaller hands. - 45 AUTO Safe Action - Length 8.03 in. - 1.27 in. - Length Between Sights 6.77 in. - 5.47 in. - Barrel Height 1.26 in. - 4.60 in. - Weights Unloaded 29.30 oz. Loaded 38.30 oz. - Trigger Pull 5.5 lbs. - Trigger Travel 0.49 in. - Barrel Rifling right hand octagonal - Length of Twist 15.75 in. - Magazine Capacity 10 plus oneBLACK FINISH