One of a Kind, Unique Redwolf Custom Cerakoting - Patriotic American Grey Cerakote by our Hillbilly223 Certified Applicator, with H-152 Stainless and H-146 Graphite Black Coatings Full License and Trademarks by Nighthawk Custom Durable Die-Cast Aluminum Construction Polymer-Constructed Grips Ambidextrous Thumb Safety Integrated Compensator Internally Threaded 11mm CW Comp for Tracer Devices Includes 11mm CW to 14mm CCW Thread Adapter RMR, RMSc, and Holosun-K Optics Footprint Ready Raised Blacked Out Suppressor Height Sights Nighthawk Custom Flat Trigger with Minimal Trigger Travel and a Light, Crisp Wall Break Wide Cocking Serrations 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.