the XM8 by both elephant ( BE) has a version 3 gearbox which means its almost all interchangeable with TM and CA version 3's. im starting this relativily soon, all i need are my parts to come in and my xm8 to get her, il keep ya posted on how its going. parts requird for this are:
-a new tappet plate ( version 3)
-a new air nozzle (g36 type)
-a new spring guide (version 3)
-a new barrel (m4 350mm range)
-a new cilinder (300mm to 400mm type)
-a new cilinder head
-a new piston
-a new piston head
-a spring that will fit in the piston but not break the plastic gear box, so it would have to be a stock mauri spring (metal gearbox is possable but the shell of the xm8's isnt exact replica so some light cutting is recuried).
dealers claim it shoots 260 fps stock, but it really shoots around 230-240, with the upgrades listed and the proper lubercation you can get an exter 30-40 fps.