CZ Scorpion Evo 3 S1 9mm carbine.
Folding stock, 16.2" hammer-forged barrel, semi-auto, 10-, 20-, or 30-round magazines. Non-reciprocating charging handle with MP5-style lockback and release.
The one shown has a fake suppressor on it, but it can be removed and a real one screwed on, or you can get it with a simple flash hider. I kind of like the fake can look, since it makes it look beefier.
I've wanted a pistol-caliber carbine for years and never found one I really liked at a price I liked. The price for this one hurts my feelings a little, since it costs $850 or more when it can be found. That's a price for a good rifle, and this is essentially a long-barrelled pistol. But I still want it.