Bushmaster IV

The Bushmaster IV is a 40 mm chain-driven autocannon designed and built by Alliant Techsystems. The Bushmaster IV is based on the M242 Bushmaster, Bushmaster II and Bushmaster III, all originally developed by Alliant Techsystems. The Bushmaster IV fires 40×365mm 3P (Prefragmented, Programmable, Proximity-fuzed), APFSDS-T Mk I, and APFSDS-T Mk II rounds. The 3P round will provide air burst capability and the APFSDS-T Mk II can penetrate in excess of 150mm armor.

Specifications
The Bushmaster IV requires 5 hp at 24 volts to operate, fires from a cook off safe open bolt with absolute hangfire protection, and ejects forwards. It fires NATO standard 40×365mm ammunition from an integral linkless feed and has a recoil force of 62272 N.