Constructed by metal, the ICS AEG Gearbox Assembly for M4/M16 Series is an excellent piece of equipment that is used as a replacement or upgrade to an M4/M16. The gearbox will boost the FPS of your rifle to 400 feet per second. Having an additional upper gearbox is equal to having another gun in urgent situations.
1X Vertical Grip
|Firing Modes||Semi-automatic, Full-automatic, w/ Functional Safety|
|Muzzle Velocity||300 FPS|
|Length||28" - 31" Inches ( Retracted-Extended)|
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