Grand Power GPP45 SA/DA 45ACP 4.25" 10 1 Black Polymer Grip Black The P45 model. The popular K100 series with it's unique rotating barrel mechanism has been enhanced by the addition of the P45 in the legendary .45 ACP caliber. Built on the latest generation of Mk12 polyamide handle which has a new steel dismantling catch. This innovation results in a stronger handle, enhanced reliability and easier field stripping. The appearance of the pistol with curved slide resembles the classic .45 caliber and provides excellent handling and ergonomics. When compared to its competitors, it provides lower lift and minimizes the recoil. Control elements are adapted to both left and right-handed shooters.