Bolter

A vehicle-mounted heavy bolter would fuck shit up rather nicely.

you're asking if there's a market for machine pistols?

>>34655039
No. We have moved past AP-HE shells for most purposes. HEDP/HEAT is better for rockets and grenades, APFDS for cannons.

basically a man portable bushmaster chaingun.

>>34655039
It would be a DD
It's gyrojet (a dead tech)
It would weigh ~50kg thefore not being man portable
It would have to do something better than what current tech does now at an affordable cost

You'd have to overcome all of those issues to be viable to a military.

Not really. Better to fire one good shot from an M3 or similar than a bunch of weaker shots from a 20mm automatic rocket gun, especially hen you have to carry all that less effective ammo in with you.
The closest you'll get is an XM25, which isn't really an anti armor weapon though HEAT rounds exist.

>>34655057
Interesting idea. Would allow for much higher caliber and the weapon to be bigger.

>>34655078
I like the idea, and sounds like a great challenge to waste a few years as a hobby. But thanks for making the problems obvious. I am pretty sure I can make a small bolter only about 20kg loaded with some R&D

>>34655083
Hmmm... I see. From what I see HEAT rounds can be made quite small if there is a desire to do so. Maybe having the bolter fire tiny HEAT rounds instead of a regular sized one could make it viable as a way to deal with light armour.