BattleMaster BLR-4S (Calvin II)
- Type
- BattleMech
- Tech
- Inner Sphere
- Mass
- 85t
- Role
- Brawler
- Intro
- 3071 Jihad
- Rules
- Advanced
- Cost
- 17.42M C-bills
- Move
- Armor
- 224 pts
ER Medium Laser ×4Light PPC ×2Machine Gun ×2Rotary AC/5Streak SRM 6

Availability by era
1 era · 1 faction
| Gun | Pilot | Adj BV |
|---|---|---|
| G0 | 1 | 5,253 |
| G1 | 2 | 4,593 |
| G2 | 3 | 3,820 |
| G3 | 4 | 3,002 |
| G4 | 5 | 2,274 |
| G5 | 6 | 1,956 |
| G6 | 7 | 1,751 |
| G7 | 8 | 1,546 |
| G8 | 8 | 1,455 |
Piloting rides one point worse than Gunnery, capped at Piloting 8, the conventional pairing. Regular is Gunnery 4 / Piloting 5.
Recognition notes
The BattleMaster BLR-4S (Calvin II) is an 85-ton brawler, cruising at 43 km/h and topping out near 65. Twin Light PPCs fill the left arm and a Rotary AC/5 the right, while the torsos carry four ER medium lasers split two to a side, a pair of machine guns, and a Streak SRM 6 in the left torso. CASE lines both the left torso and the right torso, guarding against a magazine or missile explosion. The type is recognized as a command 'Mech, and its head carries only light protection. Laser-reflective armor plates the frame, and it is assembled as a field refit at various sites rather than a single dedicated plant.
Armor & loadout
| Weapon / Equipment | Loc | Qty | Ammo |
|---|---|---|---|
| Enr | RT ×2 · LT ×2 | 4 | |
| Bal | RT · LT | 2 | 100 rds · 0.5 t |
| MslStreak SRM 6 | LT | 1 | 15 rds · 1 t |
| Bal | RA | 1 | 40 rds · 2 t in RT |
| Enr | LA ×2 | 2 |
CASE: Right Torso · Left Torso