(6 customer reviews)



The TREAD COIL sets a new standard in performance and value in the AR category. With installed accessories including ROMEO5 Red Dot Sight, Flat Blade Enhanced Trigger, and 13” lightweight handguard, the COIL is the perfect rifle package for the avid user or first-time buyer. Other features of the TREAD COIL include the precision 16” stainless barrel, ambidextrous controls, and 6-position Magpul SL Stock.



– M-LOK handguard with lightening cuts to reduce weight, available in 13” and 15” lengths;

– 3 chamber compensator;

– Ambidextrous charging handle made of aircraft grade aluminum and a dual roll pin design;

– ROMEO5 optic featuring a 2MOA dot with ten illumination settings, MOTAC, and 50k battery life;

– Flip-up front and rear iron sights that are easy to install, adjustable, and deploy quickly;

– M-LOK front sight adapter with co-witness height made of lightweight aluminum;

– Multiple configurations of M-LOK grip kits made of high strength polymer;

– Factory upgraded flat blade enhanced trigger.


Mag Type AR-15
Barrel Length 16 in (406 mm)
Height 7.5 in [191 mm]
Overall Length 30.8 in [782 mm]
Overall Width 2.5 in [64 mm]
Weight 7 lbs [3.2 kg]
Operating System Direct Impingement

SIG M400 Switchblade Details

sigm400  “The M400 Switchblade brings an entirely new level of performance to the M400 product family with unmatched flexibility and capability,” said Tom Taylor, Chief Marketing Officer and Executive Vice President, Commercial Sales, SIG SAUER, Inc.  “The pistol features fully ambidextrous controls to include the charging handle, selector, and unique to the SWITCHBLADE, the bolt catch and release for seamless transitions from hand to hand and rapid deployment of the catch. sigm400

The M400 Switchblade comprises an aluminum-frame rifle-caliber pistol. It features a Cerakote Titanium Elite finish.  The 11.5-inch cold hammer-forged carbon steel tapered barrel comes with a three-prong flash hider. A rigid free-floating handguard includes an M-LOK accessory rail. It installs with a clamp system. The pistol offers fully ambidextrous controls, including bolt catch, charging handle and selector switch. A two-stage Matchlite Duo Trigger helps shooters get the most accuracy out of the gun. ready. Chambered in 5.56 NATO, it ships with one 30-round magazine.

SIG Sauer just announced the release of its latest rifle-caliber pistol, the M400 Switchblade. The Switchblade blends the performance of the popular M400 SDI into pistols platform.

SIG M400 Switchblade: Merges M400 SDI Styling into Rifle-Caliber Pistol


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