H&K used to sell the SP89 which is the semi variant of the MP5. I don't know if it's still in production or not. An MP5 registered before '86 is still legal to own if you can afford it. I don't understand the fascination with them myself. It takes too long to load mags. I've shot a silenced one and one time did it for me. They're typically a waste of ammo.
To err is human, to forgive is devine. Neither happen to be my policy.