SIG Sauer M400 TREAD Snakebite 5.56 NATO Semi-Auto Rifle, 16 in Threaded Barrel, Two-Tone FDE/Tan & Dark Gray, Free-Float M-LOK, 30+1
The M400 TREAD Snakebite is a feature-forward AR-15 from SIG Sauer with a distinctive two-tone finish and purpose-built furniture. This 5.56 NATO rifle pairs a 16-inch threaded barrel and prong/slot flash hider with a free-float TREAD M-LOK handguard, ambidextrous safety, and Magpul MOE SL-K adjustable stock. USA markings and model identifiers are clearly applied to the receivers, and this example includes a 30-round PMAG and the factory operator's manual.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Specific Condition Notes: There are minor, superficial scratches and blemishes. The bore is clean and shiny.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
What's Included
- 1x 30-round polymer Magpul PMAG magazine
- "SIG SAUER M400 TREAD / M400 PRO" operator's manual
Chambered in 5.56mm NATO, this semi-automatic, direct-impingement M400 configuration delivers a 30+1 capacity and a 16-inch barrel with a threaded muzzle capped by a prong/slot-style flash hider. The top receiver features a Picatinny rail for mounting sights or accessories as desired.
The AR-15 upper includes an ejection-port cover and brass deflector. The free-float aluminum TREAD M-LOK handguard incorporates anti-rotation tabs and four rear cross-bolts for secure attachment, plus prominent TREAD branding.
Controls are practical and familiar: an ambidextrous safety selector and a right-side magazine release. Furniture consists of a Magpul MOE SL-K 6-position adjustable stock and a SIG SAUER branded pistol grip.
Fit and finish set this Snakebite apart, with tan receivers and barrel contrasted by a dark gray handguard in a cohesive two-tone scheme. Markings include "SIG SAUER SIGM400" on the upper and "SIG SAUER INC, NEWINGTON, NH, USA" on the lower, with the SIG circular logo molded into the magazine well.