Aa-12

[Austin]

In case anyone missed it:

Recoilless Auto Shotgun Fires 300 Rounds Per Minute, No Cleaning or Lube Required.

YouTube - AA-12. World's deadliest shotgun!

 

[Cooter]

No cleaning or lube required??? Yeah right.
Isn't that what they said about the M16 back in Vietnam, (or XM16E1 back then.)