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This MCX Patrol rifle features a aluminum KeyMod handguard, a folding telescopic stock, and a carbon steel barrel. Action Semi-Automatic Caliber 300 AAC Blackout/Whisper (7.62x35mm) Barrel Length 16" Capacity 30+1 Safety Manual OAL 35.5" Weight 6.9 lbs Stock Description Folding Right Side Adjustable Synthetic Black Metal Finish Blued Barrel Description Carbon Steel Twist 1:7" Barrel Length Range 16.00" to 17.99" Weight Range 6.00 lbs to 7.99 lbs Hand Right Stock Finish Group Synthetic Metal Finish Group Blued/Black

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The SIG MCX is an innovative weapon system built around a battle-proven core: SIG's gas-operated, short-stroke piston system. Trust it for the outstanding performance, no matter the conditions, that you've come to expect from the leading name in firearms. Rotating Bolt System: A fully locked and closed rotating bolt system provides maximum safety. Short-Stroke Piston: Reduce recoil and fouling with the gas-operated, short-stroke piston system. Two Position Gas System:The two-position adjustable gas system allows the user to increase or decrease gas as needed depending on ammunition, use with a silencer, or adverse conditions.

Even while in the field, you can configure the SIG MCX as needs or conditions change. The combination of the 13" monolithic upper receiver and handguard create a 17 3/4" continuous top rail. The upper is backwards compatible with any mil-spec AR lower, allowing you to upgrade your existing AR platform to the SIG MCX. The AR upgrade kit includes 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. Also compatible with the SB15. Quick-Change Barrel: Quickly and easily adjust barrel length from 16" to 9". Upper Receiver: The continuous-to-rail upper receiver features an integral M1913 rail at 12 o'clock and a free-float barrel system. KeyMod Handguards: The MCX offers a long or short aluminum handguard. Also available in carbon fiber and silencer compatible width.

Shooter make ready. The SIG MCX stands as the first rifle built to be silenced from the ground up. It also accepts a broad array of accessories, enabling you to build a complete weapon system for any scenario or environment. Stock Options:Maximize performance while conserving space with telescoping or folding stocks. Pistol configuration also available for the ultimate in compactness. 1913 Top Rail: Easily add sights, optics, lasers and other accessories. Multiple KeyMod Handguards: The MCX offers a long or short aluminum handguard. Also available in carbon fiber and silencer compatible width. SIG SAUER Silencers: The SIG MCX is built to operate with next-generation SIG SAUER silencers, offering leading reliability and signature reduction under heavy firing schedules.

Hi Lewis, this SIG MCX features an aluminum KeyMod handguard, : https://www.midwayusa.com/product/1017777939/sig-sauer-keymod-handguard-sig-mcx-aluminum