Hi;
Check out the HiPoint Carbine in 9mm , 40 S&W or .45acp
Now a lot of people "knock" HiPoints - but if you check, they were the #5 weapons maker in the USA last year.
magazines are interchangeable with pistol(s) of the same caliber.
I have the .40 carbine and pistols as the main weapons in my Home/Area defence set up(s).
The reason I don't have .45's as the main set up is that HiPoint did not have the .45 Carbine out on product and for sale when I had the money.