King Arms Max 11 MK12 Handguard Barrel Kit for KWA / KSC M11A4 M11 GBB Rifles Airsoft BlackKing Arms Max 11 MK12 Handguard Barrel Kit for KWA KSC M11A4 M11 GBB Rifle Made out of Aluminium and Steel. Weather resistant finish. CNC machining process for one piece formed upper receiver. Lightweight upper receiver group with full length top and bottom rail for optics and accessories. Newly designed retractable stock. Outer barrel allows for 14mm negative CCW threads, compatible with most common muzzles. Suitable for KWA KSC M11A1 GBB SMG., For