Wow Crunch, your M15 really does look like our C7, almost right down to the C79 optic sight. How much do you think you've spent upgrading the internals so far?

I've put very little into the gun in terms of upgrades. The sight is a Classic Army, but it's a replica of the US M145 sight rather than the C79. The sight was about $125 or so on ebay including shipping. Externally, the gun is completely stock right now.

Internally, I've installed a Prometheus MS110SP spring, Systema bearing spring guide, Systema polycarbonate piston, and System silent piston & cylinder head. In a couple of days, I'll be ordering a Systema tappet plate and airseal nozzle and either Systema or Prometheus hopup rubber.

Without checking the prices offhand (parts came from airsoftparts.ca or ehobbyasia), I'd say I've probably put about $150 into its internals so far, not counting the final parts I'll be ordering this week.

My final internal upgrade will be replacing the barrel with a Systema tightbore barrel sometime down the road. The only time I plan on replacing any other internals is if something breaks or wears out. Externally, I want to send my lower receiver off for complete sandblasting to remove the laser-etched Armalite trademarks and have it engraved with the Diemaco & Canadian Forces C7A1 markings. And since they're going to have to engrave the selector switch markings again, I want my full auto position to be labelled as "FUCK YEAH".