One of a Kind, Unique Redwolf Custom Cerakoting - OD Green Cerakote by our Hillbilly223 Certified Applicator, with H-236 OD Green Coating Fully Licensed by Nighthawk Custom Durable Die-Cast Aluminum Construction Polymer-Constructed Grips Ambidextrous Thumb Safety Internally Threaded for Threaded Adaptor Includes Internal Thread Cover RMR, RMSc, and K Footprint Ready Raised Suppressor Height Sights, Fiber Optic Front Sight Wide Cocking Serrations Tri-Cut Angle Top Unique Heavy Angle, Slide-Lightening Cuts Beautiful Black and Silver Two-Tone Color Scheme Blacked Out Inner Barrel MIM Steel Hammer, Magazine Catch, Recoil Spring Guide, and Sear Unit Tokyo Marui Compatible This product is only compatible with gas designed specifically for Airsoft guns. Do not use lighter fluid or butane gas, as that will cause permanent damage.