barrel swap system

[sheepherder]

Originally Posted by John Sabato

Because of the way the frame has been cut and apparently set up to be longer, I would speculate that the original perpetrator of this design had intended to use a cartridge that had a much longer overall length than the standard 9mm round.

Wouldn't the breechblock/toggle assembly have to be lengthened as well???

And the barrel extension/"receiver"??? Maybe the sear bar??? And isn't there a hold-open in that area???

Ambitious project...Any chance that this was an exercise by John Martz???