SAI GRY Custom SSG Build

### Internals - Retro Arms CNC split gearbox - Jefftron Scylla MOSFET - Tuned SSG setup - High-speed motor - Precision shimmed geartrain - Full compression setup - Reinforced internal components ### Externals - SAI GRY M4 body - M-LOK rail system - Speed trigger - Mock suppressor ### Build Work - Fully shimmed - Lubricated - Tuned - Test-fired ### Notes - Fast trigger response - Smooth cycling