Is there a good Glock armorer in the city anywhere? One of my 21's went wacky on me. I can squeeze one off just fine, but when i let go of the trigger... blam-blam-blam-blam! four or five round burst. Never ever had a glock go nuts like that before. need to get er taken care of. It's actually the first glock I owned, an OLD 1st generation. but it has a sweet Barsto barrel, so I still like to shoot it.