I have a 22lr conversion kit for the G26/27 that I need to get rid of. It has the same sights a the standard Glock so you can change them out for low cost practice with your carry/backup gun. I am unsure of the number of rounds that have been shot through it but it looks new. This link will take you to a description: http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=626063 . It comes with an additional magazine. I am asking $210.00 for it shipped. If you have any questions let me know. SOLD