Action Army AAP-01 Assassin GBB (Black).

Features: 

• Fits WE17 / Vorsk17 magazines
• Marui's new quick-adjust Hop seat
• Steel bolt latch
• Replaceable magazine latch on the left and right side
• Built-in semi / full auto adjustment button
• Patented housing (zinc alloy) and loading nozzle (nylon fiber) / G18 antifreeze rubber
• Patent safety button
• Nylon fiber body
• 14mm screw outer tube with sheath
• 129mm plated inner barrel
• Fiber optic
• Can use Safariland 579 GLS Holster
• Build Material : Aluminum Alloy / Fiber reinforced polymer
• Magazine Capacity : ( 6mm )
• Length : mm
• Barrel Length : 129mm
• Weight : 655g
• System: Gas Blowback
• Fire Mode : Semi / Full Auto
• Hop-Up : Adjustable
• Muzzle Velocity : Approx. 0.83J with 0.2bb ( Hop-Up Off )
• Package Includes : Gun, Magazine, Manual