Shop for SIG Sauer M400 SDI online at GunBroker.com
The AR-platform SIG Sauer M400 Pro is a 5.56 NATO chambered professional grade semi-automatic that’s popular with law enforcement groups. The M400 Pro also comes in a select fire version.
The M400 Pro uses a direct impingement gas operating system that uses SIG’s own micro-light gas block.
Sheltered in the full-length free-floating durable alloy M-LOK handguard is a 16” long cold hammer forged steel barrel with a 1 to 7” twist. The barrel is nitrided while the muzzle has a 1/2” diameter 28 TPI thread. It comes standard with a birdcage flash hider.
The handguard has an integrated full-length Picatinny rail and fold down front and rear sights. The receiver is hard coat anodized. The butt stock is a six-position skeletonized triangular telescoping tactical brace with integrated QD strap points.
The M400 comes with a 30 round curved aluminum magazine.
Overall dimensions are a width of 2.5”, height of 7.5”, length is 36.5” while total weight is 6.5 pounds.
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