An arm-mounted shotgun attachment for the MSJ-06II-A Tieren Ground Type MS from Gundam 00. Fires extra-high-density E-Carbon pellets in a tight spread.
The concept is that the Human Reform League - having fallen behind in the development of high-mobility variable mobile suits - decided that the best way to combat AEU and Union mobile suits was to take advantage of their light weight. Since both the Flag and the Enact (not to mention the Hellion and Realdo) are built light and slim, they can (A) fly, and (B) dodge most of the Tieren series' weaponry. Hence: shotgun. Pound the Flags' and Enacts' feather-light E-Carbon bodies with a cloud of heavy pellets and boom! Down they go. Once they're firmly grounded and off-balance, the Tieren's heavy armaments and carbon blade are sufficient to turn their flimsy bodies into smoldering debris.