My son in law lost his keychain a few weeks ago at a sales conference. He had his trigger lock key on it. It was the only one he had. So today he brought the shotgun by the house so I could "work" on it. (hunting trip tomorrow) It was a Master brand so I thought it would be pretty rugged.
To make a long story short and several broken cut-off wheels for my dremel (wrong tool for the job obviously)....I decided to use the Diamond impregnated cut-off wheel on my grinder. It cut through that thing like butter. A little prying with a screwdriver and a turn of the bolt...and it was apart....less than 5 minutes.
Moral of the story.....Gun Locks are ONLY good at keeping little hands from getting into trouble. But for us adults with the right tools...piece of cake to remove it without a key.
redhawk