Slick Side Billet AR-9 9mm 4" Nitride Pistol Upper Assembly M-LOK

4" Slick Side Billet 9mm Nitride Pistol M-LOK Upper Assembly An affordable pistol upper assembly without cutting corners. This means using a nitrided steel gas block from an American Manufacturer as opposed to aluminum and quality American Made handguards, paired with a 4 Nitride treated barrel chambered in 9mm. This also means taking the time to ensure that the upper will function reliably. We use Permatex 242 on key components while using mil-spec AEROSHELL 33MS Anti-Seize grease on the properly torqued barrel nut and muzzle device. Specifications: AR-9 Slick Side Billet Upper Receiver 6061 Aluminum Pairs with any Mil-Spec Lower M4 Feedramps Barrel 4 9mm Pistol Length Nitride 1:10 Twist M-LOK Free Float Handguard American Made Extruded 6061 Aluminum Muzzle Device KAK Slimline Micro Flash Can - 1/2x36 Limited Lifetime Warranty