Pretty much, yes.
Largely pointless but pretty fierce none the less. MC51s are said to be pretty ineffective due to having such a short barrel, and this has about half the barrel length. (4.3" or something i think.) But why stop there, when you can have a belt-fed MC51..
https://youtu.be/dGPeSUDbUJ4?si=j6uhI2v8ckWSQjtt