The Glock G20 Gen 3 was introduced in 1998 and featured an integrated accessory rail known as the Universal Glock rail. Other upgrades of this polymer-framed pistol included thumb rests on both sides of the frame and finger grooves on the front strap. Glock later improved on the G20 Gen 3 further by adding a modified extractor that doubled as a loaded chamber indicator as well as an enlarged locking block and an extra cross pin. DetailsThe GLOCK 20SF in 10mm AUTO provides nothing short of massive firepower. The use of GLOCK hi-tech polymer considerably reduces felt recoil. With muzzle energy of 550 ftlbs and a magazine capacity of 15 rounds this 10mm is your reliable companion on every hunt. The G29 also provides a safe and accurate finishing shot even when hunting big game. The SF model reduces the circumference of the receiver at the rear or backstrap offering increased comfort and controlespecially to shooters with smaller hands. - CaliberSystem 10mm Auto Safe Action - Length 204 mm 8.03 in. - Width 32.50 mm 1.27 in. - Length Between Sights 172 mm 6.77 in. - Height 139 mm 5.47 in. - Barrel Height 32 mm 1.26 in. - Barrel Length 117 mm 4.60 in. - Weights Unloaded 870 g 30.71 oz. Loaded 1120 g 39.54 oz. - Trigger Pull 2.5 kg 5.5 lbs. - Trigger Travel 12.5 mm 0.49 in. - Barrel Rifling right hand hexagonal - Length of Twist 250 mm 9.84 in. - Magazine Capacity 10