SIG Sauer M400 Sentry Rifle, 16-Inch Barrel

Description

Built for range use, training, and recreational shooting, the SIG Sauer M400 Sentry is a semi-automatic rifle with a 16-inch barrel and a free-floating M-LOK (Modular Lock accessory mounting) forend. This configuration includes a mounted Romeo5 Gen II red dot, a Foxtrot-MSR full-size light, a vertical foregrip, and one 30-round polymer magazine. The rifle uses a mid-length direct impingement operating system and a six-position Magpul MOE-SL stock.

Key Specifications

• The rifle uses a semi-automatic action for a familiar manual of operation.
• The barrel measures 16 inches and is made from chrome/moly steel.
• The barrel has a 1:7 twist rate for the rifling specification provided.
• The barrel is threaded with a 1/2×28 pattern and includes a SIG flash hider-compensator.
• Overall length measures 36.5 inches for the supplied configuration.
• Unloaded weight is listed as 8.0 pounds.
• The rifle uses a black anodized receiver finish.
• The free-floating forend is made from alloy and uses M-LOK mounting slots.
• The rifle includes a Romeo5 Gen II red dot, Foxtrot-MSR full-size light, vertical foregrip, and three M-LOK rail covers.
• The package includes one 30-round polymer magazine.

We stock this configuration for shooters who want an integrated optic and light setup with the rifle’s primary accessories included. The two-stage Matchlite Duo trigger, ambidextrous safety, six-position stock, and free-floating forend define the control layout. The black finish and Magpul MOE-SL stock keep the exterior treatment consistent across the rifle. The included Romeo5 Gen II, Foxtrot-MSR light, vertical foregrip, and rail covers complete the package as supplied.