Jump Jet attachments
From Halopedia, the Halo wiki
Jump Jet safety restraints are shoulder pauldrons presumably designed for use by either pilots or jetpack users, compatible with MJOLNIR Powered Assault Armor/Mark V.[1]
Shoulder
Jump Jet
File:Halo Reach shoulder armor jump jet.jpg
Early prototype safety restraints for use with extant Jump Jet equipment.
Price: 5,000 cR
Sources