Guns
Well apart from the A-10 - a great aircraft but in dire need of 21st century avionics, which I understand it's getting now - we used to work alongside them at West Freugh -
A lot of aircraft have guns 'hung on' - seemed to work well on the Harrier 1, as quite a few Argentinian pilots & troops will affirm.
The Hawk does well with a single 30mm gunpod too ( built in Mauser 27mm on the Hawk 200 ) - during a sales tour Jim Hawkins hit a can on a post with a single shot.
( with an A-10 even the previous existence of the post would be a matter of debate ! )