Powered by Green Gas Tough Full Steel Construction Durable Simulated Surface Treatment Real Steel Spec External Furniture (Drop-in Real AK Furniture) Highly Detailed with Period Correct Production Markings CNC Integrated Steel Bolt Carrier Enlarged 22mm Cylinder Diameter for Stronger Recoil Impulse Simulated long-stroke piston Action like Real AK Adjustable Bolt Travel Setting, Long Stroke (Full Travel) for Simulation & Short Stroke for Increased Rate of Fire Realistic Full Steel Internal FCG (Fire Control Group) with Braided Wire Hammer Spring & Cycle Rate Reducer Easy Disassembly Hop-Unit Design VSR Spec Hop-Bucking and Inner Barrel Warsaw Pact Dovetail Optics Mount on Left Side Lightweight Aluminum Magazine (Only 388g) with 42-round Capacity Last Round Click Indicator Dry Firing Mode AK74M / AV74M Part Diagram AK74M / AV74M User Manual 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.