The MAC 50 is an alteration of the AC 50-1 with 60in (1524mm) salt-water fording capacity, 333hp/250kW Cummins engine and Allison transmission, among other alterations. Maximum lifting capacity is 50 US tons and main boom maximum extension is 82ft (25m). All four axles are driven and steerable. Total weight is 32t (70,000 lb).

The first four cranes are scheduled for verification testing at the US Aberdeen Proving Grounds in Maryland. Another crane will be run through the same tests at Terex’s Zweibruecken, Germany factory to provide support to the Marine testers.