SIG SAUER M400 TREAD V2 | 5.56 NATO | 11.5in | PM400-11B-TRD-V2

The SIG Sauer M400 TREAD V2 is a compact AR-style pistol built around an 11.5-inch cold hammer forged steel barrel chambered for 5.56 NATO (.223 Rem). It uses a free-floating M-LOK enhanced handguard, a Sig Matchlite two-stage trigger, and ships with a 30-round polymer magazine and a Magpul BSL telescoping brace for stabilization. For a practical optic that pairs well with this platform and stays below a $1,000 budget, consider a Vortex SPARC AR or a Holosun red-dot designed for AR-style pistols.

Typical applications include range training and practical/competition shooting where compact handling and modular accessory options are priorities. The rifle-style controls and optics-ready upper make it straightforward to configure for rapid target transitions and accessory mounting.

Product Specifications

• Make and model: SIG Sauer M400 TREAD V2 (PM400-11B-TRD-V2).
• Caliber/cartridge: 5.56 NATO (.223 Rem).
• Barrel length: 11.5 inches.
• Barrel material: Cold hammer forged steel.
• Action type: Semi-Auto.
• Magazine capacity: 30 rounds.
• Magazine included: 1 x 30-round polymer magazine.
• Handguard: Free-floating M-LOK enhanced handguard.
• Trigger: SIG Matchlite two-stage match trigger.
• Stock/brace: Magpul BSL telescoping brace.
• Operating system: Carbine-length gas system with low-profile gas block.
• Rate of twist: 1:7 twist rate.
• Overall length: 30.1 inches.
• Weight: 5.9 lbs.
• The UPC is 798681698950.

The M400 TREAD V2 combines compact geometry with full-size AR ergonomics and accessory compatibility. Its free-floating M-LOK handguard and optics-ready receiver make it easy to adapt for optics, lights, and controls that suit the shooter. The cold hammer forged barrel and two-stage trigger support consistent shot-to-shot performance, while the Magpul BSL brace provides a familiar, adjustable interface for one-handed and supported shooting positions.

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