Quote:
Originally Posted by ThunderCactus
Take the spring, spring guide and sector gear out, screw the mechbox together, and push the piston to the back of the mechbox and see if it gets jammed.
You may need to chisel/file down the rear ways or get a new shell.
I know this was common with guarder shells many years ago
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Piston o-ring too. If you have a tight seal it's hard to let "gravity" move the piston.