Board Thread:Warhammer 40k General Discussion/@comment-211.26.90.118-20130804022732/@comment-3580035-20130804085713

Seem more like RPGs to me. Diamond-tipped for armour piercing, explosive charge designed to detonate within a person, rocket propelled micro-thrusters whilst in flight, .75 size, etc.

Heavy Stubbers seems to have larger barrels. Autocannons are by far larger again.