Also MP5N kit
Match trigger pack, semi only, straight trigger
Magazine paddle anti rattle
MP5 .40 S&W:
Bolt Hold Open handle
Burst trigger group
As you can see, (If you look closely), the trigger groups in the pic below are all set up for an MP5/40/10/357 Sig.
They are all unmolested from the standpoint of being clipped and/or pinned.
Which one were you interested in?
I have some black mags. They are NOT the pre-ban FBI ones. I forget who had them for sale a few years ago
when I got some.