The SIG Sauer P320 is a versatile striker-fired pistol built around a modular metal chassis system. This design allows for easy transformation between different sizes and calibers, including 9mm, .357 SIG, .40 S&W, and .45 ACP. The P320 also offers interchangeable polymer grip frames in small, medium, and large sizes to accommodate various hand sizes, enhancing control and comfort for a wide range of users. Its disassembly process is designed for safety, requiring magazine removal and slide lock before the slide and chassis can be separated from the grip module.
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