Does pretty much what it says on the tin. Adds the "swordfish" foregrip, previously only available on airsoft versions of the MP5, to the Compact-5 Submachine Gun, as well as a neato little custom assault stock and an extra ammunition type that, when combined with said foregrip, pretty much turns the Compact-5 into an average middle-of-the-line SMG that just happens to look fucken sweet.
Drag handle doesn't move when reloading from empty. I have no idea why this happens and because of how painful making these models even work ended up being I'm too scared to ask.
Nice