The P320 is a modular semi-automatic pistol designed and manufactured by Sig Sauer. It features a unique design that allows users to easily change components such as the grip frame, slide, and barrel, enabling customization for different hand sizes and shooting preferences. The P320 is available in various calibers, including 9mm, .40 S&W, and .357 SIG, making it versatile for different applications. This pistol is known for its striker-fired mechanism, which provides a consistent trigger pull. The P320 has gained popularity among law enforcement and military organizations, as well as civilian shooters, due to its reliability and ease of use.