The SIG Sauer M400 SDI in 5.56mm (MPN RM400-SDI-16B-MSGRN) is a semi-automatic AR-15 platform rifle finished in Moss Green, built around a 16-inch barrel with a 1:7-inch twist. SIG Sauer ships the rifle with one 30-round polymer magazine. Among AR-platform rifles in the AR rifles category, the M400 SDI favors shooters who want a genuine SIG-built AR with a distinctive Moss Green finish.

Key Specifications

• Chambered in 5.56mm/.223 Rem.
• Has a 1:7-inch rate of twist.
• Built on a semi-automatic AR-15 platform.
• Features a 16-inch barrel.
• Finished in Moss Green.
• Feeds from a detachable magazine with a 30-round capacity.
• Ships with one 30-round polymer magazine included.
• Measures 33.25 inches overall.
• Ships optic-ready, with no fixed sights installed.
• Ships at approximately 9.6 pounds shipping weight.

Frequently Asked Questions

What finish does this rifle have? Moss Green.

Does this rifle come with a magazine? Yes, one 30-round polymer magazine.

Does this rifle come with sights? No, it ships optic-ready with no fixed sights installed.

Buy the SIG Sauer M400 SDI 5.56, Moss Green

A genuine SIG-built AR with a distinctive Moss Green finish is exactly what the M400 SDI delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.