G&G ARP 556 2.0 (Black).

Features:

• Materials: Aluminum and nylon polymer
• Ball speed: 350 fps
• Mid-cap 170 bbs mag
• Weight: 1964 grams
• Hop-up: adjustable
• 168mm internal barrel
• Overall length: 597mm
• Mounted in bushings of 8mm (oil-less)
• Multi-position retractable stock
• Battery connector type mini tamiya
• Battery wiring in the buttstock
• 6-inch M-Lock aluminium hand guard
• Integrated ETU (electronic expansion) to improve performance
• Built-in programmable mosfet for burst shooting (bursts of 3 shots)
• Engine: Long axis 25k Ifrit orange long axis
• Thread diameter for silencer / flame shield: 14mm CCW (anti-clockwise)
• Flip-up metal sight