Airsoft- How to prevent gearbox from breaking

[@RobertSmith-xh4lx]

Thanks...this is something I will definitely look at when I start building my M4 Dmr... just waiting for my barrels, and parts to get here.

[@cristiancastanocampoy]

Podrias hacer un video explicando
El
Short stronk de 4 dientes y el por qué o una preparación y detalles a tener en cuenta? Un saludo

[@ikharus1]

I placed plastic instead of rubber but it also shattered hahaha also the gearbox

[@AC-AirsoftCustoms]

It is normal since the material is still soft. That's why i used aluminum in the first place.