I had one of those years ago. What bothered me most, was the way the design magnified the recoil of the 9mm round.
Yes, I knew from the outset that a semi copy of a SMG pistol isn't really a practical gun. I did have some fun with it, but besides essentially unusable sights, the recoil was worse than any other 9mm I ever had. AND it was in a gun bigger and heavier than all my other 9mms.
The big bolt slapping back and forth over a pistol grip a 90 degrees just made it really awkward to shoot.
I replaced (eventually) the Cobray with a Tec 9. Still gives the Walter Mitty dream of a subgun, but is much more practical to use. Still not as good as a regular handgun for any serious use, but easier to plink (and get hits) with than the Cobray.
I did, one time, get a 25rnd drum mag for a 1911A1. Neat idea, kind of like the Luger snail drum. However, this one was absolute crap. Would not work in any of 3 different guns I tried it in. Simply would not feed. If you see one of these, even if tis free, avoid it.