Rock Island Armory 51991: Action: Single - Caliber: 10mm - Capacity: 8 - Finish: Parkerized - Front Sight: Fiber Optic - Rear Sight: Adjustable - Grips: VZ G10 - Barrel Length: 5\" - Overall Length: 8.5 - Weight: 2.49 lb. - Rock Island Armory met with elite LE teams and designed a tactical 10mm to meet their requirements. The 1911 Tactical II features a full-length guide rod snag-free combat-style sights and a parkerized finished.