As much as I loved this gun, after a 100 rounds, I found that I had a deep groove in my trigger bar from the slide rubbing on it. The range that I shoot at, was where I purchased the gun, and the owner is also a gunsmith. I showed him what was going on, and he agreed, that that was an unacceptable flaw that Glock needs to address. I was in so high hopes that my gun was one that would not be affected, but no such luck. The range owner is supposed to find out from the factory rep. if the Gen 4 30SF guns have been fixed. If not, this gun shop will not be handling this particular model any longer. What a shame.