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Sig Sauer RMCXR-556N-16B-RX2: Introducing the MCX Regulator using the heart and soul of the legendary MCX platform combined with a proprietary lower design all built around shooter ergonomics comes a whole new level of MCX modularity. Never before has a ranch rifle possessed the DNA of a rifle used by elite Special Forces operators around the world. The MCX Regulator is here and the ranch rifle is about to change forever Mount up. - SIG MCX-REGULATOR FEATURES: - Reduced Weapons Visual-IR Signature GEN II NiR FDE - Cerakote - Magpul SGA Stock Mossberg 500/590/590A1 - Fully Ambidextrous Mag Release Safety Selector and Bolt - Catch - SIG Designed Compensating Muzzle Brake - Receiver Integrated Arca Rail - Lower Receiver Compatible with All MCX Upper Receivers - 3 MOA Romeo2 Optic Installed on RX model - Caliber 5.56 NATO - Sights ROMEO2 Installed - Barrel Length (IN) 16.0 - Mags Included (1) 10rd Polymer Mag - Mag Type AR-15 - Action Type Semi-Auto - Stock Type Magpul SGA Mossberg 500/590 Traditional - Barrel Material Cold Hammer Forged Carbon Steel - Trigger Type 2-Stage Match - Twist Rate 1:7 - Forend Type Alloy - Receiver Finish Gen II NiR FDE Cerakote - Overall Length 39.1 in - Overall Width 2.4 in [61 mm] - Height 5.5 in [139.7 mm] - Accessory Rail M-LOK - Operating System Gas Piston - Weight 8.0 lb. [3.6 kg] w/Magazine