Marksman IX GBB Airsoft M4 9mm Rifle - Black (VFC GBB System)

9mm AR-15 Style Gas Airsoft PCC Steel 14mm CCW Flash Hider CNC Aluminum Outer Barrel CNC Aluminum 7.5 Inch M-Lok Handguard Steel Magazine Release Steel Bolt Lock Leaver, Hammer & Sear CNC Aluminum Bolt Carrier Five Position Retractable Stock Comes with 50 Round Gas Magazine Magazine Compatible with Umarex (Elite Force) Glock Series Gas Airsoft Magazines (By VFC)? 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.