Caliber: 22 LR. Features: Similar to other .22 Mark IV autos except has Zytel grip frame that matches angle and magazine latch of Model 1911 45 ACP pistol. Available in 4.4-, 5.5-in. bull barrels. Comes with extra magazine, plastic case, lock. Molded polymer or replaceable laminate grips. Weight: 25-33 oz. Sights: Adjustable. Updated design of Mark III with one-button takedown. Introduced 2016. LITE models features aluminum barrel sleeve. Values are for the Standard Model; add 35% for the 22/45 Tactical and 22/45 Lite variants.