I’ve only just had this modified by eagle6 but need to reluctantly sell due to a change in circumstances.

box, stick mag, modified drum mag with pressure pad, 2200 mah battery wired to deans. 

here is brief description of what was carried out. Full modifications in pics. 
 

FPS Results (Hop Set / Range Tested 65m)

356 FPS (Measured On 0.20 gr BB)

296 FPS (Measured On 0.28 gr BB)

Tested At Range - 65m 0.28 ammo

 

Scope Of Work: 

Sent In To Upgraded

 

Installed

Labour / Reshim / Rebuild

Eagle6 Upgraded Main Spring M90 AES

Prometheus Purple Hop Rubbers x3

Prometheus tightbore Barrels 275mm x3

Eagle6 Hop Arms and Nub

Eagle6 AA12 tappet plate Spring

Retro Arms Bushings

Retro Arms Piston 

Warhead Motor Base 35K

Butt Pad Modification For 2200mah 7.4v

Drum Mag + Remote Switch Modification

Here is the eagle6 video of my SGR12