SIG Sauer P320

Type: Submachine gun / pistol-caliber carbine. Origin: United States / Switzerland. Introduced: 2010s. Action: short-stroke gas piston, rotating bolt. Common caliber(s): commonly 9x19mm; not normally 5.56x45mm. Description: The SIG MPX is a modern pistol-caliber platform designed around familiar AR-style controls with a compact, modular layout. It is most commonly chambered in 9mm and is intended for law enforcement, competition, and close-range defensive roles. Its strengths include low recoil, good ergonomics, suppressor-friendly operation, and modular barrels/handguards. Important data note: the uploaded list shows 5.56x45mm, but the MPX is generally a pistol-caliber firearm, most often 9mm. SIG’s 5.56 rifle/carbine family would be a different platform. Strengths generally include the role-specific advantages described above, while limitations include age, weight, recoil, cost, ammunition logistics, or reduced practicality depending on the model and configuration.