The 120-ton Ust (100 mt) lifting capacity Grove GMK5120B (Grove GMK5100 European Designation) All Terrain Mobile Crane is mounted on a 5-axle 10 x 8 x 10 drive carrier.  This model has a 42-167 ft (12.8-51 m) five-section, full-power MEGAFORM boom with a patented TWIN-LOCK boom pinning system, for a maximum main boom tip height of 177 ft (54 m). 

Lattice Jib Extension: Two 26 ft. (8 m) inserts for use with lattice swing-away extension to increase length up to 85 ft. (26 m) or 112 ft. (34 m) for a total tip height of 279' (85 m).

Hydraulic Offsettable Lattice Swingaway 36 ft. - 59 ft. (11 m - 18 m) hydraulic offsettable lattice swingaway extension. Hydraulically offsettable 5°-40° with hydraulic luffing.

Counterweight 68, 300 lbs. (31, 000 kg) consisting of various sections with hydraulic installation/removal system.

Upper Superstructure Engine Mercedes-Benz OM904LA, diesel, 4 cylinders, water-cooled, turbocharged, 168 HP (125 kW) at 2300 rpm. Max. torque: 487 ft./lbs. (660 Nm) at 1200 rpm. Engine emission: EURO II/EUROMOT/EPA/CARB (nonroad).

Lower Carrier Engine Mercedes-Benz OM502LA, diesel, 8 cylinders, water-cooled, turbocharged, 469 HP (350 kW) at 1800 rpm. Max. torque: 1, 696 ft./lbs. (2300 Nm) at 1080 rpm. Engine emission: EURO II/EUROMOT/EPA/CARB (nonroad).

Transmission Daimler Chrysler G 240-16 with EAS (Electronic Automatic Shifting), 16 forward and 2 reverse speeds. Single-speed transfer case with inter-axle differential lock.

Tires 10 tires, 20.5 R25.

G.V.W. 123, 115 lbs.

While this model is no longer in production. It had a very successful production run and was superseded by the Grove GMK5135 All Terrain Crane. 

This model is still fully supported by Grove Distributors, and multiple units are available for sale on online crane marketplace websites.