it
very simple with the instructions that are on the glock talk forum under the kahr forum. I assume you goin go the 5# striker spring. You will love it,
besides the eye protection. Have that slide inside of a nice plastic bag as sprngs will fly if you are not careful and u will never find them, this way they will stay in the plastic bag, if it happens. not to scare you but just to let you learn from other people's mistakes..