For sale section tends to have them every few weeks. Best bet is to go there, chances are you might get a good deal, metal slide and outer barrel, plus extra mags for a good price. I bought my second KSC Glock 19 with metal slide and 2 mags (to go with my stock KSC G19 with 2 mags) from my cousin, I loaned him $200 at one point with the G19 and the 2 mags to hold onto, he paid me back $50 and was trying to sell the GBB for $300, so I gave him $200 to make me the new owner (honestly, barely used my stock G19 since that day I got it, the metal slide has such a nice CLINK sound when shooting!)
Anyways, a sweet gun, especially with the metal upgrades, using propane and either .30 or .36g BBs!
