KJ Works Glock 23C. Metal slide and barrel version. Farts the gas straight out from mag fill valve. I've tried WE G19 mags in it to check for function, shoots and cycles but lack lustre, which could be because of the WE mags gas router being different to KJ and TM's, and have gone as far as taking the rear chassis out and nothing is broken. Never the less don't quote me on that, selling as boneyard. £30 collected from High Wycombe, Bucks or £38 all in posted and paypal'ed.