The M4 Carbine is another variant in the M16 family, with a shorter barrel length and adjustable stock, it's currently in use by the U.S. Armed Forces.

1:1 Scale
Metal Gears
Propulsion: Electric
Weight: 7.0 lbs.
Length: 30.5" / 34" (Extended)
FPS .20g BB: 350
Mag Capacity: 150 / 300 / 5000
Extra Mag Number: 48608 (300 round), 1851101 (300 round) or 185111 (5000 round)
Extra Battery Number: BAT841050SM
Gears: Metal
Package: Box