Orbital ATK 30mm MK44 Bushmaster Posted November 13, 2017 in NFA / Suppressors / Class III by Nicholas C with 37 CommentsTags: 30mm, bushmaster, destructive device, Orbital ATK, tanks The Orbital ATK MK44 30mm BUSHMASTER II fired from Kongsberg MCT-30 turret on GDLS LAV The destruction and ammunition is impressive. These mid air exploding rounds are the MK310 Mod 0 PABM (Programmable Air Burst Munition).