PSA 7.5" Pistol-length 300AAC 1/8 Phosphate 6" Lightweight M-Lok Railed Upper With Romeo 5, BCG, & CH

Barrel: 7.5" Chambered in 300AAC Blackout, with a 1:8 twist rate, M4 barrel extension, and a pistol length gas system. This phosphate barrel is finished off with a PSA 6" Lightweight M-Lok free-float rail, .750" diameter low profile gas block, and an A2 flash hider.Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. These uppers are made for us right here in the USA by a mil-spec manufacturer.Bolt: Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is parkerized outside, and chrome lined inside.Sig Sauer Romeo 5 Red Dot:ROMEO5 compact red dot sights provide civilians and armed professionals a robust 1x aiming solution for any situation. Ultra-low parallax so point-of-aim is point-of-impact and the red dot remains parallel to the bore of your firearm, no matter what your viewing angle is relative to the optical axis of the sight. Unlimited eye-relief allows you to acquire the aiming point and the target regardless of the position of your eye behind the sight. The readily available CR2032 battery is side-loading, allowing for quick battery replacement (featuring 50,000+ hours or more of life). Dependable waterproof (IPX-7 rated for complete water immersion up to 1 atmosphere) and fog-proof performance.FEATURES:2 MOA Red-Dot provides 10 illumination settings (8 daylight plus 2 NV) for visibility in all light conditionsMOTAC(TM) (Motion Activated Illumination) powers up when it senses motion and powers down when it does not. Provides for optimum operational safety and enhanced 50,000+ hour battery lifeIntegrated M1913 Picatinny interface provides industry-standard mounting options for a wide range of applicationsDependable waterproof (IPX-7 rated for complete water immersion up to 1 meter) and fog-proof performanceIncludes a M1913 Picatinny low mount riser and a co-witness 1.41" riser mount