Turns out it was the Scherer 3.5# unit. But it had been in the gun for years with no issues. Anyone else who has this unit in their Glock, be ready, and be safe.
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...