My friend isn’t Army, Marines or special operations ninja. Instead of a short-barreled MP5, a Sub2000 has to suffice. It works.
Keltec weapon light on a rail forend, 50 round drum that actually functions, red dot sight, extended charging handle, GG&G adapter for single point sling, vertical foregrip. If 50 rounds feels like too much, 33rd and 17rd stick magazines also work.
Keltec light is small, bright and very simple in use. It does one thing — very well.