Description
SIG Sauer M400 TREAD V2 Rifle, 5.56 NATO, 16-Inch Barrel, Black, 30-Round
The SIG M400 TREAD V2 is SIG’s no-compromise AR: a 16 in. stainless barrel, mid-length gas, a Matchlite Duo two-stage, and a TREAD-engraved free-float M-LOK handguard.
TREAD V2 is SIG’s no-compromise AR. A 16 in. stainless barrel, mid-length gas, and a Matchlite Duo two-stage sit under a TREAD-engraved free-float M-LOK handguard. SIG built V2 from shooter feedback: more handguard, a cleaner trigger, Magpul’s SL-K stock. The lower is ambidextrous on the safety and magazine release, with QD cups on the receiver.
The stainless barrel is 1:8 twist with SIG’s 3-prong flash hider on a 1/2-28 tapered shoulder. Mid-length gas is the V2 default. Magpul’s SL-K stock is six-position. The rifle is 6.5 lb, 35.8 in. extended and 32.5 in. collapsed. Width is 2.6 in. Height is 7.1 in.
This black TREAD V2
This is the black anodized TREAD V2 with one 30-round magazine. No Cerakote, no factory optic, no Coil grip kit. Stainless 16 in. barrel, 3-prong flash hider, Magpul SL-K. A factory red dot is not installed.
What ships
One 30-round magazine ships in the box. This is a serialized 5.56 rifle and ships to a licensed FFL. See the SIG M400 collection.
Specifications and Included Items
- Model: RM400-16B-TRD-V2
- Caliber: 5.56 NATO
- Barrel: 16 in. stainless steel, 1:8 twist, 1/2-28 tapered shoulder
- Muzzle: SIG 3-prong flash hider
- Operating system: Mid-length direct impingement
- Trigger: SIG 2-stage Matchlite Duo, flat
- Controls: Ambidextrous safety and magazine release; lower-receiver QD mounts
- Handguard: TREAD-engraved enhanced free-float M-LOK
- Stock: 6-position Magpul SL-K
- Finish: Black anodized
- Overall length: 35.8 in. extended, 32.5 in. collapsed
- Weight: 6.5 lb
- Optic: Optics-ready; a factory red dot is not installed
- Magazine included: One 30-round polymer AR-15 magazine
- FFL: Rifle; ships to a licensed FFL dealer








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