SIG Sauer M400-SDI X 5.56 NATO 30+1 Blue/Black Rifle

Description

Product Overview

The SIG Sauer M400-SDI X is a 5.56 NATO semi-automatic rifle developed with input from professional instructors at the SIG Sauer Academy. Its free-floating handguard uses a dual-clamp steel locking system to reduce deflection and maintain consistent accuracy while providing accessory attachment points on all four sides. Fully ambidextrous controls, including the M400 lower receiver bolt catch and release, support efficient operation from either shoulder. A mid-length gas system, low-profile gas block, SIG 2-Stage Matchlite Duo flat trigger, and Magpul SL stock complete the performance-focused configuration.

Key Features

• 16-inch threaded barrel supports muzzle-device and suppressor installation
• Free-floating M-LOK handguard with rigid dual-clamp steel locking system helps preserve accuracy when accessories are mounted
• Fully ambidextrous controls accommodate left- and right-handed shooters
• SIG 2-Stage Matchlite Duo trigger provides a crisp 4.5 to 6.5 pound pull
• Mid-length gas system and low-profile gas block promote smooth cycling
• Flat-top receiver is optic ready for a compatible red dot sight or scope mount

The SIG Sauer M400-SDI X combines ambidextrous controls, a match-style trigger, and a rigid free-floating handguard in a versatile 5.56 NATO rifle.