Proposed Cannon Would Turn the B-1 Bomber into a Gunship
Military.com 17 May 2018 By Oriana Pawlyk
The B-1B Lancer bomber already carries more weapons than any of its counterparts. But officials are exploring the possibility of adding a cannon to its arsenal.
Boeing Co. has been granted a patent for a cannon that could enhance the aircraft's ability to take on more close-air support roles. The patent, U.S. 9,963,231 B2, shows various mounts for the gun, which would retract into the aircraft's belly.
https://www.military.com/defensetech/2018/05/17/proposed-cannon-would-turn-b-1-bomber-gunship.html