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.
finds it's better to get started than to waste time planning!
