That moment Dr. Frankenstein creates an apocalyptic scrap gun

Post apocalyptic guns are fun, thompsons are neat. Mixing three guns' parts together is just freaking sweet. This franken-creation is a mix of a Thompson M1A1, M1928, and an M4 SPR that wasn't being used. We're thinking of creating some post-apocalyptic parts kits for a few guns to emulate guns used in video games and movies such as Fallout, The Mad Max series, and Rage. What guns do you think should be created.