I've had my open bolt WE M4 since August and use it regularly, and I've had few problems so far. But if I were to upgrade some parts, I would like to know if it is compatible with WA/G&P parts.
I have done some research and aparantly it can use a real steal charging handle, but that's about all I can find.
Do any of you gas users know if the lower receiver parts can be interchangable between brands, and can they use various mags?
Also, would red gas be a bad idea for winter games?