What is this item, Artillery primer?

Hello, I would like to get the details on this item. 1.98 inches long and looks like it may be some sort of ordnance primer. With nothing in the tube is it inert?

Thanks Liberty


Yes that an artillery lock-combination primer (for bag guns).

MK 15 MOD 1, Electric and/or percussion.

Either 1937 or 1931, it’s hard to tell.

TS and AY are inspectors initials.

If there is nothing in the case it means it has been fired and somebody squeezed the “petals” back in to make it look original.

Fairly common.


Ray, Thanks a bunch. Thought it was something like that.