The High Cycle series from Marui has an above-average rate of fire of 1500 BBs / minute (with an 8.4V battery).
Gearbox: Version 3
Motor: Short Type (EG-3000 High Cycle)
Material: ABS plastic
Magazine capacity: 250 (6mm)
Length: 678-760mm
Weight: 2560g
Inner barrel length: 150mm
Muzzle thread: without thread
Muzzle velocity: 260-280 FPS / 0.63-0.73 Joule
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