The quality is good.  Having used it now I'm not sure its the best kind of lock in terms of safety.  Sort of a one size fits all.  No matter how tight you make it you can still force it to move and possibly engage the trigger.  Obviously if a child were messing with it and it happened to be loaded that would be a bad thing and basically negate the purpose of the lock.  Go with a cable lock you can loop through the chamber.