They will fit serpas but you need a serpa for a different version of Glock, can't remember which number though. CD, I'd have thought they'd be the same as the WE is a clone
I'm not worried about holsters, it's the Hera arms glock carbine kit (build for marui so it not sure if a we glock will fit!) I'm too scared to spend out 60 pounds to Hong Kong without any idea if it will fit or not >.<
Same is true for the TM Glock, Ed. It won't fit in the 17 holster, but a 21/22 will fit it nicely. To answer your question though: Why in the hell would you spend £60 on one of those hella-ugly and impractical carbine kits!?