Upgrading your Glocks

[Dutch]

I've got the Guarder/Shooters Design upgrades listed below fitted to my Glocks and I'm pretty happy with the external appearances now but I'm trying to get my guns as strong/powerful/reliable as I possibly can so I'm wondering what upgrades others are using on their guns and which of those you'd recommend? Opinions and thoughts would be greatly appreciated.

Aluminum CNC slides
Steel outer barrels
Serial number tags
Steel magazine catches
Steel trigger levers
Standard slide stops
Steel valve knockers
Recoil spring guides
Enhanced loading muzzles
Polymer frames
150% hammer springs
Steel full auto sears (for my G18Cs)

[Proffrink]

Re: Upgrading your Glocks

Very good place to start (if you've not already seen it): http://www.airsoftcanada.com/showthread.php?t=140496