This is model 20-290, Ajax Assault Tank Prime, for BattleTech, from Iron Wind Metals: link
This is a tank with a T-shaped turret and a small missile launcher on the upper hull, plus a double-gun mini-turret on top of the turret. It also has various domes, knobs, and decorations, including a wedge sticking out the hull rear.
(One functional difficulty is that, as the model has been sculpted, the main turret can't traverse – the missile launcher is in the way! I'm going to pretend the launcher is retractable
)
According to the fluff, this tank is armed with a Gauss Rifle, Autocannon, two medium pulse lasers, and short-ranged missiles (SRM-4).
Fitting all of this into a Large (Class 4, in my opinion) vehicle will be challenging
Equipment Item VSP : BVP Spaces Cost
Vehicle, class 4 20 : 0 20 20
Armor class 4 20 : 36 20 36
Fusion Generation Plant 20 : 36 20 58
Fast tracked 20 : 36 20 72
1 class 4 HKP in
Full traverse turret 20 : 36 8 112
with Basic fire control 20 : 36 8 120
1 class 2 RFAC in
Full traverse turret 20 : 36 4 130
2 class 1 HEL's in
Full traverse turret 20 : 36 0 154
1 APSW 20 : 36 0 154
The problem here is that, to me, the secondary gun looks too large for a mere class 2 autocannon
and I've had to leave off the missiles! So here's another version:
Equipment Item VSP : BVP Spaces Cost
Vehicle, class 4 20 : 0 20 20
Armor class 4 20 : 36 20 36
Fusion Generation Plant 20 : 36 20 58
Fast tracked 20 : 36 20 72
1 class 3 HKP in
Full traverse turret 20 : 36 14 102
1 class 3 HVC in
Full traverse turret 20 : 36 5 126
with Basic fire control 20 : 36 5 132
1 class 1 HEL in
Full traverse turret 20 : 36 3 144
1 GMS/L with Basic guidance 20 : 36 1 164
I've had to downgrade the main gun and combine the two lasers into one "firing as if" weapon, but it gives the larger secondary gun plus the missiles.