SIG Sauer P556xi 10 Inch PSB .300 Blackout Black Pistol

Description

Product Overview

The SIG Sauer P556xi is a .300 Blackout semi-automatic pistol built around the 556xi operating system and configured with a 10-inch barrel. Its short-stroke gas piston action is designed for reliable cycling, while the PSB pistol stabilizing brace provides additional support during shouldered or supported shooting positions where legally permitted. The rifle-style controls, aluminum receiver, polymer grip, threaded muzzle, and accessory-ready handguard create a versatile platform for range use and defensive applications. Standard backup sights are included, and the top rail provides a solid mounting point for a compatible optic.

Key Features

• .300 Blackout chambering supports a broad range of supersonic and subsonic ammunition
• 10-inch threaded barrel accepts compatible .300 Blackout muzzle devices and suppressors
• Short-stroke gas piston system helps keep operating components cleaner than direct-impingement designs
• Ambidextrous manual safety and familiar AR-pattern controls support adaptable handling
• PSB pistol stabilizing brace provides additional firearm support where legally permitted
• Top rail and M-LOK handguard offer flexible mounting options for optics, lights, and accessories

The SIG Sauer P556xi combines compact pistol dimensions, piston-driven operation, and .300 Blackout capability in a brace-equipped platform suited to configurable shooting setups.