My duty gun is a Glock 22 serial DEE - G-22 - July 1999 - 3rd Gen. - Factory Rebuilt. Yes I realize my department is cheap and bought rebuilt guns. I am getting a new one and I am able to purchase this one for $260. I'm wondering if anyone knows what the rebuild all entails. Through the course of its service life it has received numerous new parts (springs, slide releases, etc) but i would like to know what the rebuild entails.