|The "cartridges" vary somewhat from manufacturer
to manufacturer due to patent issues etc.
Also, the early
"cartridges" where quite often extremely simple in
construction .i.e. a simple one piece machined brass "tube" closed
at one end, with a machined extractor groove.
Of course the
"cartridges" changed along with the cap technology.
"cartridges" used paper caps. the newer type of
"cartridges" use the" plastic" caps.
Of course, this
type can be extremely complex in construction being usually 2 or
more parts, the case bottom, with the "prima" the middle
section and the piston (all usually machined out of brass/steel).
last count, there must be at least 20 variants of "cartridges"
out there! unfortunately their price reflects their complication level,
At least $1.50/$2 dollars each! (depending on the supplier/manufacture)
The "cartridges" appear to be machined on an cnc driven lathe.
watch technology for a toy! so, unless someone out there has access to
an cnc lathe and wants to make some..............Japan might be
the only source! fortunately, the "cartridges" are reusable,
(if properly cared for) a properly cared for "cartridge" will
out last the "modelgun!"