First Ever GBBR Line of the Chinese Type 56 AK Series High-Quality, True 1:1 Replica with 90% of the Gun Made of Steel Follows Exact Real Steel Construction Method Forged Trunnion with Reinforced Steel Rivets Stamped Steel Receiver and Dust Cover Laminated Wood Furniture (Handguard & Pistol Grip) Realistic Fire Control Group (FCG) with Highly Realistic Wire Hammer Spring Forged Steel Bolt Carrier with 2-Stage Recoil Spring Assembly Last Round Empty / Oh SH*T Audible Click Indicator Proprietary GBB System (GHK Similar System, Non-Compatible) Gas Efficient 30 Round Magazine with Stamped Steel Outer Shell Adjustable Hop-Up with Rotary Dial Semi / Full Automatic Fire Mode Windage & Elevation Adjustable Front Sight Post with Elevation only Rear Leaf Sight 645mm (Folded) & 870mm (Fully Extended) 405mm Inner Barrel 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.