CMC Triggers Mil Spec Buffer Tube Kit Fits AR-15 Anodized Finished Black. Six position AR-15 buffer tube is machined from 7075 T6 aluminum to Mil-Spec dimensions with a Type III Class II hard coat anodized finish. Buffer tube has through drainage holes to allow water to be evacuated in submerged environments. Machined high carbon steel Castle Nut and Quick Detach End Plate are heat treated for extra strength and given a nitride finish for durability and corrosion resistance. Kit contains a standard 3 oz. carbine buffer and a carbine action spring made of high-tensile steel. Specifications for CMC Triggers Mil Spec Buffer Tube Kit: Manufacturer: CMC Triggers Color: Black Finish: Anodized Black Gun Make: AR Platform Gun Model: AR-15 Case Finish: Anodized Handle Color: Black Blade Finish: Anodized Handle Finish: Anodized Features of CMC Triggers Mil Spec Buffer Tube Kit: Black finish Package Contents: CMC Triggers Mil Spec Buffer Tube Kit What firearm models does the manufacturer say CMC Triggers Mil Spec Buffer Tube Kit is compatible with? The manufacturer suggests that CMC Triggers Mil Spec Buffer Tube Kit is compatible with AR-15