SIG Sauer M400 Forge 5.56 AR Pistol, 11-inch

The SIG Sauer M400 Forge 5.56 AR Pistol (SIG Sauer part no. PM400-556N-11B-FORGE) brings SIG’s M400 platform to a forged-receiver, value-focused build without sacrificing the ambidextrous controls SIG shooters expect. Chambered in .223 Rem/5.56 NATO with an 11.5-inch barrel, this M400 Forge ships with a 30-round magazine, giving shooters a compact, high-capacity 5.56 pistol ready to run right out of the box. It’s a strong option for shooters who want genuine SIG engineering in an accessible, forged-receiver AR pistol.

Key Specifications

• Chambered in .223 REM/5.56 NATO, one of the most widely available rifle calibers.
• Runs an 11.5-inch barrel for a compact, maneuverable pistol package.
• Holds 30 rounds, with a 30-round magazine included.
• Built with ambidextrous controls for both left- and right-handed shooters.
• Uses a forged receiver for durable, value-focused construction.
• Runs a reliable semi-automatic action on the AR-15 platform.
• Equipped with an Ambidextrous safety for secure handling.
• Equipped with a TriggerTech two-stage flat blade trigger broken at approximately 3.5 pounds.
• Weighs approximately 6.2 pounds.

Frequently Asked Questions

Does this pistol include a magazine? Yes, it ships with a 30-round magazine.

Is it built with ambidextrous controls? Yes, the M400 Forge is built with ambidextrous controls for both left- and right-handed shooters.

Buy the SIG Sauer M400 Forge 5.56 AR Pistol

Get genuine SIG engineering in an accessible, forged-receiver AR pistol. Order the Sig Sauer M400 Forge from our Lubbock, Texas gun shop for fast, insured shipping to your FFL as soon as it’s ready to ship, from our AR pistols lineup.