Just installed some upgrades for my Glock 19 today :
Slug Plug – to plug the hole in the grip. I don’t know why Glock never bothered to fill this in the first place. WEIRD!
Stainless Recoil Guide Rod – this one is noisier than the stock polymer guide rod but more durable.
Extended Magazine Release – I also filed down the sides to give it a slight bevel so it won’t bite into my skin.
A Glock .25cent Trigger Job – basically polishing the metal areas to smoothen out the action. It works, just barely, you can tell that the trigger pull is slightly smoother, but you can still feel the polymer on steel drag during the pull.
A Scherer 3.5# Connector – Had to polish the heck out of this one. Look at all the imperfections. sheesh.
All done, except for the extended slide release which is on Backorder.