GHK latest AK V3 GBB version system Additional GHK AK V3 magazines are NOT yet available (Compatible with ALL old version GHK AK Gas & CO2 magazine series) GHK AK V3 GBB system, parts can NOT be used with the old version of the GHK AK GBB series Newly-made Stamped Steel Receiver with Realistic Scale Steel Outer Barrel with Dual-Locking Design Laminated Wooden Stock and Handguard Brand new AK V3 GBB HOP-UP set Quick Release Hop-up Unit for Ease of Maintenance Full Steel Bolt Carrier Group Steel Realistic Two-Stage Recoil Spring Set Lengthened Bolt Stroke 2 Buffers Included to Control Rate of Fire & Bolt Travel Distance 21mm Oversize Nozzle Cylinder for Better Recoil Feedback Optimized Guide Rail to Reduce the Risk of Breakage of the Nozzle Group Brand New GHK AK V3 GBB System Gas Magazine, 20% Lighter Compared to Previous Version (670g /540g) 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.