The WE glock is thicker than the Maruis and every other glock airsoft maker. It might fit in a Blackhawk Glock 21 serpa holster although I havent tried it. I just use the Glock17/22 holster and itll fit tight in the holster, obviously, but won't lock in place.
Nope, limited quantities sold in 2 seperate pieces exactly as asgi is selling them now.