A few months ago I started having problems with my glock, mainly with FTE. At first i thought i was bad ammo, i.e. cheap ammo. I bought some good deffensive ammo, same thing. Maybe i was limp wristing? I shot and shot, same results. As time went on it got worse, now it will only shoot about 3-4 rounds without a FTF or FTE. Does this mean I need a new spring of some sort or buffer? I dont know a whole lot about glocks. Thanks for any help anyone can give me. By the way this was a used gun, it was in about 90% shape when bought it. That was about 6 years, 700 rounds ago. Thanks again.