The APX has been put through extensive testing and evaluation at the end user level. The result is a pistol that delivers superior performance in durability and reliability, ergonomics, trigger, and modularity. Utilizing a removable, serialized chassis frame, the APX can be easily modified with replaceable grip frame housings and is simple to disassemble and simple to maintain. The APX’s aggressive full length slide serrations make slide manipulations easy under rigorous conditions. To accommodate right or left-handed use, the APX’s magazine release button can be easily reversed, and the slide stop is ambidextrous.