School me on the MP5 clones

[ace4059]

I was looking at the hk sp5k but ruled it out because I can’t use a suppressor. I specifically bought a 3 lug suppressor for this.

I guess the zienth it is. Only bad thing I’ve seen about them is the 3 lug barrel wasn’t machined correctly and a guy’s suppressor kept coming loose. He sent it back and they fixed it.

So what’s with the fbi, navy, and other fire controls?
I would like an ambi safety since I’m left handed.

Any one I should get to sbr? Reverse stretch? No local gun shops have any so it’s hard it imagine how they will fit in my hand and on my shoulder. I’m just unsure which one will be the most ergo friendly.