I've got a 1st generation glock and bought all new crome plated internals including a extractor for it is there anything i should know befor installing the parts or will they just drop in?
All the parts I've ever replaced (not that many) just drop in. There was a documented test a few years ago where a number of Glocks were disassembled, I believe ten of them. They mixed all the parts together, then assembled ten perfectly working guns. Says something for interchangability...
This is true, I bought a well used Glock 21, and promptly sent it off to Glock for any upgrades. I got back what looks like a new gun! Most of the internal parts are new, and they also did the ejection port bevel cut and refinished the slide. Price was indeed $0.0.