I do not own any Glock pistols at this time; 03/2013, but I may buy a Lipsey's FDE limited ed Glock or a Glock 30S .45acp when the US panic attack slows down.
There are a few high end after-market barrels for Glock pistols; Bar-Sto(Irv Stone), KKM, Jarvis, Storm Lake, LoneWolf Dist.
For custom Glock work & parts, see:
www.glockbooks.com www.customizeyourglock.com www.glockworx.com www.glockstore.com www.glock.com www.lasermax.com www.trijicon.com .
ClydeFrog