Specifications

Double Bell M4 Metal gearbox is a ready drop in gearbox for your Double bell M4. This gearbox is amazing quality and can be installed into a lot of different gel blasters with the correct t-piece and minor receiver mods.  These are very durable and tested boxes as we have been running them for the last couple of years without any major issues.

Please remember to check all local laws regarding the usage and ownership of gel blasters in your particular State or Territory.

Use protective eyewear at ALL times as the incorrect usage can lead to eye damage.

Gel blasters must be concealed during transport and used in designated areas.

Please note: This gearbox is not compatible with early model, ambidextrous, fire select receivers.