Gomann Berlin

[Schupo]

Here is an example of the police marked ERMA conversion unit. These single shot training units fit the 9mm P.08 by the way.

[sheepherder]

Originally Posted by Schupo

Here is an example of the police marked ERMA conversion unit. These single shot training units fit the 9mm P.08 by the way.

Very interesting! These sub-caliber conversions lock on the front sight base rather than a chamber lock like the .22 Erma conversions (stepped & flanged barrel insert).

George, is the 4mm cartridge center fire??? I suppose it would have to be...

[kurusu]

Originally Posted by sheepherder

Very interesting! These sub-caliber conversions lock on the front sight base rather than a chamber lock like the .22 Erma conversions (stepped & flanged barrel insert).

George, is the 4mm cartridge center fire??? I suppose it would have to be...

There is/was a 4mm M20 cartridge. And it's centerfire. It has no powder i'ts propelled by primer alone.

[Schupo]

Originally Posted by sheepherder

Very interesting! These sub-caliber conversions lock on the front sight base rather than a chamber lock like the .22 Erma conversions (stepped & flanged barrel insert).

George, is the 4mm cartridge center fire??? I suppose it would have to be...

Yes, the single cartridge is loaded by hand and extracted with a rod run through from the muzzle. Here is a period description.

George