Nightshade24, on 09 April 2015 - 04:23 AM, said:
--snipped for brevity--
The Annihilator's variants that would be both "timeline appropriate" and "available to the IS"** would be the ANH-1A, ANH-1E, and ANH-2A.
**The Wolf's Dragoons didn't bring any SLDF-spec or Clan-spec variants with them when they came to the Inner Sphere in the early 3000s, only the "downgraded" ANH-1A. The ANH-1E was created as a field refit by the Dragoons during the Battle of Misery in 3028. The ANH-2A was introduced by the Dragoons in 3048.
Everything else is far out-of-timeline (ANH-3A, ANH-4A, and ANH-2AX are all Jihad-era), require Clan-spec equipment on a chassis that is only used in the IS (the Gausszilla set), or is locked up in some forgotten Brain Cache on the Clan Homeworlds (ANH-1X and ANH-1G).
And it's well-established that the Clans stopped building the ANH over two centuries before the Invasion ("before the Golden Century", with the Golden Century beginning with Nicholas Kerensky's death in 2834) & the Dragoons weren't sharing the design with anyone until the Jihad (and even then, only with the Wolves-in-Exile), so no one else had access to the chassis.
The Kraken comes close - but not quite there - on timeline-appropriateness (second variant in 3053, third variant in 3054).
With both of those chassis, the issue is the simply-absurd degree of boating that some of the variants would permit:
- ANH-1A: 100-ton IS-tech 'Mech with 4 ballistic hardpoints (1 in each arm, 1 in each side-torso) + 4 energy hardpoints (1 in each arm, 2 in CT)
- ANH-1E: 100-ton IS-tech 'Mech with 8 energy hardpoints (3 in each arm, 2 in CT)
- ANH-2A: 100-ton IS-tech 'Mech with 4 ballistic hardpoints (1 in each arm, 1 in each side-torso) + 4 energy hardpoints (1 in each arm, 2 in CT)
- Kraken Prime: 100-ton Clan-tech 'Mech with 14 ballistic hardpoints (5 in each arm, 4 in RT)
- Kraken 2: 100-ton Clan-tech 'Mech with 8 ballistic hardpoints (2 in each arm, 4 in RT)
- Kraken 3: 100-ton Clan-tech 'Mech with 9 missile hardpoints (4 in each arm, 1 in head)