The SIG Sauer P320 is a modular semi-automatic pistol designed for versatility and ease of use. It features a striker-fired mechanism and is available in various calibers, including 9mm, .40 S&W, and .45 ACP. The P320's modular design allows users to easily change grip sizes and calibers by swapping out components, making it adaptable for different shooting preferences. This pistol is known for its reliability and accuracy, making it popular among law enforcement and military personnel. The P320 has a smooth trigger pull and a low bore axis, which helps reduce recoil and improve control during shooting. Its design includes a polymer frame and a stainless steel slide for durability.