Originally Posted by lurkingknight
The front of the gearbox shell coming off is normally a v2 issue, v3, v6 and v7 aren't as common... if at all. But the potential is still there because of the cylinder window.
the front of my TM V3 gearbox broke clean off after 2 years of use with a 400 fps spring.
my friend's PTS ACR gearbox (V2/V3 hybrid) broke within a year on a 350 fps spring... (light usage, wasn't even gamed. most shooting was done for testing only)