Rock Island Armory 51577: This 45 Caliber pistol has a 3.10 barrel and includes a stable low profile angled sight design for consistent accuracy and reliability. Add comfort dovetail grip safety and G10 grips and you have a lifelong compact 1911 at a great price. - Caliber: 45 ACP - Capacity: 10 Rounds - Front Sight: Dovetail mounted standard - Rear Sight: Fixed novak type - Length: 6.30in / 160mm - Height: 5.51in / 140mm - Grip: G10 - Frame: Parkerized - Slide: Parkerized - Barrel Length: 3.10in / 80mm - Trigger Pull: 4-6 lbs. / 1.36-1.81 kgs - Length of Twist: 1 in 16 (400mm)