I picked up a new Sub-2000 (Glock 17 model) about 2 months ago but fired it for the first time this past weekend. I know, owning a new gun for two months before pulling the trigger really should be a sin! Anyway, the rifle wouldn't "cock", it would feed, extract and eject but the trigger wouldn't engage. After releasing the bolt prob. 10-12 times it finally cock and I was able to fire the rifle. I finished the first magazine, inserted the 2nd and continued firing. I thought maybe it was me (?) and not the gun. After firing a few other other guns I went back to the Sub and the problem started all over. Any ideas on what could be causing this? I bet I'm about to experience the hassels of sending a gun back to its maker. Thanks in advance for any help or ideas.