.45 ACP/Auto caliber; GI Style Serrations, For a unique aesthetic; Traditional Cut, The traditional cut keeps the lines of the traditional 1911 slide with a dustcover swoop; Inverted Rib, To cut down on glare our top rib is cut into the slide; Tactical Hammer, The skeletonized hammer helps to reduce weight and maintains the clean look of the pistol; Flat K style trigger, The flat K-style trigger is a twist on the standard three hole trigger that looks like a 'K'; Ambi Safety, Grip Safety, An ambidextrous safety allows for an easy to access to the safety for both left-handed and right-hand shooters; Mainspring Housing Checkering, Our 25 LPI checkering on the flat mainspring housing provides the means for a superb grip; Stan Chen SI Magwell, Reloads are made easy, our magwell helps to funnel the fresh mag into the gun; Front Serrations, Forward cocking serrations give solid purchase for press-checks; Fixed Night Sight, A Novak-style snag-free sight with tritium self-illuminated vials; U-notch Rear Sight