Specna Arms / Rock River Arms Licensed EDGE Series M4 AEG (Model: M4 Archer / Black)

Features Aluminum alloy upper and lower receiver with deep laser engraved Rock River Arms (RRA) logos Scratch and weather resistant nano coating Nylon fiber furniture GATE X-ASR Mosfet ESA quick spring change system allows the spring to be changed without the need to disassemble your gun Rotary type hopup with 6.03mm tight bore barrel 380 fps spring pre-installed from factory, optional 310 fps (M90) spring included to reduce muzzle velocity New Orion Gearbox with reinforced shell and internals