Join any chat board or gun discussion and SIG Sauer will make its way to the top. Known primarily for its pistols’ “To Hell and Back” reliability, SIG Sauer has put the same innovation, reliability and quality assurance into its rifles.
The SIG MCX line features AR-style pistols, SBRs and carbines in .300 BLK! According to SIG Sauer, it is now offering the new MCX line in .300 AAC. Engineered for it and built from the ground up to be silenced, light and short, the MCX series is a breakthrough in modularity. The SIG MCX is proof the dawn of a new era doesn’t happen overnight, but it will revolutionize the way we think about modular rifles going forward.
The SIG MCX is a weapon system built around a battle-proven core: SIG’s gas-operated, short-stroke piston system. For the ultimate in modular flexibility, you can reconfigure SIG’s MCX easily in the field. This makes the operator a true multi-mission threat and ready to handle new challenges in seconds as the battlefield dictates.
The combination of the 13-inch monolithic upper receiver and handguard create a 17.75-inch continuous top rail. The upper is backward compatible with any MIL-SPEC AR lower, allowing you to upgrade your existing AR platform to the SIG MCX. The AR upgrade kit includes a side-folding stock assembly and adapter.
SBX Stabilizing Brace
With a folding knuckle, the SBX improves the single-handed shooting performance of your SIG MCX Pistol. It is also compatible with the SB15. The ATF recently clarified its ruling on the stabilizing brace. Click here to read all about it.
Stock Options
Maximize performance while conserving space with a telescoping or folding stock. Is the length still too much? No worries. The MCX is also available in a pistol configuration for the ultimate in compactness.
AR-Style, Ambidextrous Control
SIG maintained the features and configurations you are already familiar with—no retraining required. The SIG MCX features a familiar AR-style ambidextrous selector, bolt release, magazine release and charging handle.
Rotating Bolt System
The fully locked and closed rotating bolt system on the MCX provides maximum safety and durability. Durability increases by the inclusion of a Nickel Boron coated bolt and carrier.
Short-Stroke Piston
There is not much to say that the title does not already tell you—reduced recoil and fouling with the gas-operated, short-stroke piston system. Nothing beats a short-stroke of course!
Auto-Regulating Gas System
The piston position automatically adjusts based on system pressure allowing the user to switch between subsonic and supersonic ammunition or silenced and non-silenced operation seamlessly.
Upper Receiver
The continuous-to-rail upper receiver features an integral M1913 rail at 12 o’clock and a free-float barrel system.
Quick-Change Barrel
Likely one of the most adaptable features an AR rifle can posses is a quick-change barrel. The MCX quickly and easily adjusts to accommodate a barrel length from 16 to 9 inches.
KeyMod Handguards
A fan of the KeyMod system? The MCX offers a long or short aluminum handguard. For the ultimate looking lightweight rig, the MCX is also available in a carbon fiber and silencer-compatible width.
| SIG MCX Carbine | |
|---|---|
| Action | Semi-Auto or Select-Fire |
| Barrel | 16.0 inches; 1:6 (300BLK) / 1:7 (5.56 NATO) / 1:9.5 (7.62x39mm) |
| Caliber | 300BLK / 5.56 NATO / 7.62x39mm |
| Trigger | MIL-SPEC; 6.6-8.6 pounds |
| Overall Length | 35.75 inches |
| Weight Unloaded | 6.0 pounds |
| Operating System | Gas piston, rotating bolt |
| Stock | Multiple configurations |
| Magazine Capacity | 30 rounds |
| Magazine Type | AR-15 |
| Forend Type | Alloy keymod |
Tell us what you think about the SIG Sauer MCX in the comment section.
[dave]
I Took my MCX out of the box. Loaded a 30 round mag into my MCX and began to zero. 26 rounds into it my MCX locks up. Blew the buffer springs into pieces causing them to jam the bolt. AWSOME SIG AWSOME, the first and last time I buy SIG