On Sat, 13 Jul 2019 17:01:15 +0200, Tosspot
wrote:

A discussion down there --v or up there --^ reminded me CO2 cartridges
come in a least two connectors, threaded and not. I've been caught by this.

Why the difference? Who cam first?

During my mis-spent childhood in the 1950's and 1960's, there were BB
guns that all used non-threaded CO2 bottles. I didn't have one, but I
did collect the spent CO2 cartridges to make small rockets that fit
into aluminum cigar tubes. These had lead plugs and no threads.
During the 1980's, there was a movement to remove lead from products
which resulted in a redesign of the lead plug used on the non-threaded
CO2 cartridges. I also noticed that the threaded bottles were lighter
and available in a variety of sizes. BB guns continued to use
non-threaded cartridges because that's what fits and works best for
fitting into the gun. However, paintball guns used threaded because
they needed larger CO2 cartridges. Drink carbonation devices tended
to use proprietary cartridges and connectors, for obvious (profit
based) reasons.

Disclaimer: I'm not really an expert on the use and abuse of CO2
bottles, just an observer with a potentially faulty memory. You might
ask the same question in a forum or newsgroup for BB and paintball
gun.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558