PP-19 GBB Base with Strike Industries KP9 Tactical Conversion Kit by Toxicant Clone of the Phenomenal Tokyo Marui AK MWS GBB Operating System Stamped Steel Receiver with Steel Outer Barrel and Externals Picatinny Rail Interface Dust Cover for Optics Up Top Traditional Dove Tail Side Optics Mount Adjustable Power Output (NPAS-Type) Adjustable Tool-less TDC Hop-Up Conventional 38-Round Green Gas Powered Curved Magazine Last-Round Cut-Off or Dry Fire Switch Found on Magazine Strike Industries Tactical Enhancement Kit: M-LOK Polymer Tactical Handguard Ergonomic Pistol Grip with Straighter Grip Angle and Aggressive Grip Texture Enhanced Charging Handle for Intuitive Manual of Arms Lightweight and Low Profile SI Tactical Side-Folding Stock (Right Side) 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.