MSD-313 Missile Rack

The Behring MSD-313 "Marsden" Missile Rack is a size 3 missile rack that is able to carry one size 3 missile.

In-game description
"Behring’s MSD-313 'Marsden' is a complete ordnance storage and deployment system that can be mounted on any compatible size 3 hardpoint for the reliable and effective launch of one S3 missile."