Unusual looking barrel

[sheepherder]

Originally Posted by nukem556

nope, that was the only pic...my guess is it was turned down to make the last section the the barrel straight, not tapered, so it could be threaded for the suppressor...

But you could do that and still hide it under the band...I'm thinking it's clearance for the latch, when you're depressing & unscrewing it...

Or it could be because the internal thread was tapped with a 'standard' tap size and the barrel needed to be turned down to that size...I measure ~.530" at that point on my S/42...Could it be turned down to 1/2" and threaded for a Nationa Fine or maybe even National Extra Fine thread???

Does anyone know if the latch/button presses in (parallel to the bore axis) or does it cantilever??? Is there a keyway in the barrel that it engages???