Novritsch x UShot Collaboration Compact Full Auto and Semi Auto Pistol Fixed Non-drooping Barrel Universal Optics Footprints Easy to Adjust Top Down Adjustment Hop-up Able to hop Heavy BBs for Accuracy and Range Gas Saving and Efficiency with Cut Out Slide Ambidextrous Fire Controls, Accommodating Left- and Right-Handed Shooters Compatible with Glock spec. GBB Magazines Low Profile Fibre Optic Iron Sights Picatinny Rail Interface for Peripheral Accessories 14mm CCW Threaded Outer Barrel, allows mounting of Muzzle Devices Compatible with Closed and Novritsch Open Universal Holster HPA-ready Platform Aluminum Slide with Polymer Lower Black Finish 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.