Jerry Miculek's open class heater appears to have had the internal lock disabled.
That's a big ol' vote of confidence, there.
The management in Massachusetts can un-lash themselves from the mast any ol' day now and admit that their lock is an aesthetic abomination and mechanically questionable, especially on heavy-recoiling guns. If you just gotta have an integral lock on your heater for legal reasons or whatever, there have to be a million better ways to do it. There's no need to ride this bomb to the ground, Slim Pickens.