word of caution, to reove the factory sights get the glock factory pusher, if your installing trijicon your going to need either the trijicon tool or the MGW one cause trijicons are tight, if you installing the factory glock night sights the glock tool will get them on.... but the caution is still there that it may not as well.
when using the mgw or trijicon sight tool to remove the rear Factory plastic sight they usually ruin it, if you don't mind that then don't worry...
to buy the Trijicon Factory tool which is around $100 phone police ordnance in ontario, they also sell nightsights and the factory glock tools as well.