Thanks - weird - I guess UI did not google the right words, and I'm usually pretty good at it. But a carbine has a bolt not a slide. Kinda like Clip and Magazine.
OK - got a new project. It will cost the same to order 5 new CZ 3+ mags, but this is a better fix for me.
ooops - no solution without a slide stop spring - and no one seems to have them. Also, not sure how to pull out and change the front lower pin, and not sure its the same on both. ALso not sure how to swap/install the ejector. Critical.
https://www.youtube.com/watch?v=8AIMO9onCXs Helpful.
The ejector looks doable and likely the same - person at CZ USA said yes.
CZ Parts are closed and have been off and on. CZ USA is NOT doing well. Of course I need them now. I don't feel like spending $60-70 on a lower if CS USA has them for $30-40 and the whole thing for $150 - the price of some CZ mags. It also looks like the takedown pin is different - it is $70 - ugh! Better to get the whole lower!
BTW - CZ still uses the "moron method" to screw in their FCG to the housing. They use a soft head and weld the screw ni place so it is impossible to carefully remove the screw. I suppose the lawyers are in control here, or the foreman who was drunk never left.