M4 URX4 KeyMod (FULL METAL)

Manufacturer: CYMA
Velocity [FPS]: 390
Gearbox version: v2 Gearbox
Type of fire: Single, auto
Lenght [mm]: 685-765
Inner barrel length [mm]: 300
Weight [g]: 2565
Magazine type: Hi-Cap magazine
Magazine capacity [pcs]: 300
Hop-Up: Yes, adjustable
Blow Back: No
Battery included: Ni-MH 8,4