You wanna silence a nest of field guns fast? Karnov (Gunship). Oodles of machine guns in multiple directions, insanely fast, and BV so low it's almost cheaper than some of those gun platoons. Make high-speed dashes that end each turn almost directly over the gun batteries(the 'almost' is very important - NEVER end movement directly above any of them), then lay waste to multiple platoons at once.
The infantry are faced with three bad options: ignore you as they keep firing the guns(and die), silence the guns for a bit to shoot at you with their normal weapons(likely at pretty bad numbers), or waste time turning the big guns around to shoot you, after which you'll likely be long gone.
Come to think of it, if you're the player using field guns, it might be wise to give them some kind of AA escort.
Karnovs, yuck. Low payload, poor armor, and way, way over-engined. Looks pretty though. You can do the same thing with 2 extra tons at 25 tons or just 1 extra ton at 21 tons, but with a lower BV and C-Bill cost. Overall bad design.
I wouldn't recommend the Karnov Gunship. Lots of MGs and it's arranged like a porcupine, but is that really a good thing? Unless you're facing an entire battalion of infantry you're quite unlikely to get more than 2 arcs worth of MGs on targets at one time, and if you are you're probably in danger of a platoon getting in the same hex as you and taking a good shot on you. If you're firing on multiple targets you're also taking secondary target modifiers so chances are you miss on several rolls. Infantry that do connect on a VTOL tend to drop 'em like a bad joke, so I'm not so sure that VTOLs for infantry hunting is that great of an idea.
If you still want to use a VTOL for that, alternatively I'd take a flight or 2 of Ferrets to a Karnov. Ferrets are even faster than Karnovs, far cheaper in both C-Bills and BV, and have a single MG each (no porcupine setup but you can split the Ferrets to strike several targets further apart, and no secondary target modifiers). 4 standard Ferrets are just a hair more expensive in BV than 1 Karnov Gunship, 2 "wild weasels" are slightly less. While a standard Ferret won't survive a stray hit, honestly, a Karnov won't survive much more anyways, and the Wild Weasels at least are nearly as durable as Karnovs.
