At 48 38 tons, is it really that light?
It's light for a modern MBT, most of which are in the 50-60 ton range. The Brits have just gone extra-heavy for their MBTs going back to Chieftain.
Leopard 2 and Abrams are like the Jumbo Shermans. They started off around the same weight as most other modern MBTs and just kept piling on more and more armour. About a dozen tons each. In hindsight, it's miraculous all that weight has done a number on their suspensions and other parts.
C1 Ariete (1995): 54 tons
Leclerc (1992): 54.5 tons (series 1), 56.3 tons (series 2), 57.4 tons (series XXI)
Type 90 (1990): 50.2 tons
Type 10 (2012): 40 tons (basic loadout), 44 tons (standard loadout), 48 tons (full loadout)M1 Abrams (1980): 54 tons, 57 tons (M1A1),
65 tons (M1A2 SEP v2), 67 tons (M1A2 SEP v3)Leopard 2: 55 tons (2A4), 59.5 tons (2A5),
62.5 tons (2A6M), 66.5 tons (2A7V)Challenger 1:
62 tons (regular), 70 tons (external armour)Challenger 2:
64 tons (regular), 74 tons (external armour)Type 98/99: 51 tons (98), 55 tons (99A)
Type 96:
41 tons, 43 tons (96A/96B)K1: 51 tons, 53 tons (A1), 54.5 tons (A2)
K2: 55 tons
Altay:
65 tonsT-90:
46 tons, 46.5 tons (A), 48 tons (SM)T-80:
42.5 tons (B), 46 tons (U)T-72:
41.5 tons (A), 44.5 tons (B)Merkava:
63 tons (Mk. 1/2), 65 tons (Mk. 3/4)Some older MBTs:
Chieftain: 55 tons
Leopard 1:
42 tonsAMX-30:
36 tonsT-64:
38 tons (A)T-62:
37 tonsM60:
46 tons, 48 tons (A1), 49.5 tons (A3)Type 74:
38 tonsJust for reference, the last heavy tanks:
T-10: 52 tons
M103: 59 tons
Conqueror:
64 tonsAnd some 'medium' tanks (most as originally designated, but later switched to MBT)
Panzer 61:
39 tonsPanzer 68:
41 tonsM46:
44 tonsTAM:
30.5 tonsI'd also note the MPF is still a prototype, so once all the nubbins are added on, it probably actually will weigh and probably perform a lot like a previous-generation MBT like a Leo 1 or AMX-30. AJAX is listed as having 'growth potential' to 42 tons, and has about an 800 horsepower engine, which is... yeah. A Leo 1.
Or conceptually, maybe a bit like the TAM which combined a Leopard 1-ish turret on an IFV (Marder) hull