I found this info on sarna.net:
Custom Variants:
AS7-D-H Devlin Used by Devlin Stone, this Atlas variant used a combination of Clan and Inner Sphere technology to maximize survival. The ER Large Lasers, XL Engine, and heat sinks came from Clan sources. A Heavy Duty Gyro is also fitted to enhance survivability. The LRM and SRM launchers have been replaced by a single MML-9 with an Artemis IV system. CASE II protects each side torso from ammunition explosions, an Angel ECM suite foils Blakist communications gear, and for additional protection the left torso carries an Anti-Missile System. For additional protection the cockpit, sensors, and life support system in the head are all armored. BV (2.0) = 2,491[10]
AS7-D-H Kerensky The custom version used by Nicholas Kerensky, this version of the Atlas II retains the weapon array of the original but swaps the Inner Sphere components for more advanced Clan equivalents. It also adds a second SRM launcher. All the missile systems are equipped with Artemis IV fire control systems. Double heat sinks were replaced with their less bulky Clan equivalents and increased to nineteen. The ferro-fibrous armor protection remains the same, but again was replaced by more compact Clan version. To handle electronic warfare duties, a small ECM Suite and Active Probe were added to the center torso. The CASE systems were integrated into the side torsos, as was common to all Clan designs. BV (2.0) = 2,777[11]
AS7-D-HT Its origins unknown, the only known example of the AS7-D-HT was found inside Castle Nautilus, an SLDF Outpost Fortress found in the world of Artru, in the Aurigan Reach and used by Kamea Arano during her final defeat of the Aurigan Directorate.[12] This seemingly custom variant retains the bulk of the standard model's weapon loadout save swapping the LB-X-10 for a mammoth Autocannon/20 for enhanced short-range combat.[13] If Devlin Stone and Nicholas Kerensky can customize their 'Mechs to the degree that they did, why can't we? I am a 'MechWarrior too with the C-Bills and ingenuity to customize my 'Mechs. Adding a ballistic hardpoint to the left torso of an Atlas is not a Earth-shattering change, especially considering what they did to their Atlai in the above lore.
If Devlin Stone and Nicholas Kerensky can change their 'Mechs to the degree that they did, why can't we? I too am a 'MechWarrior with the C-Bills and ingenuity to customize my 'Mechs. Adding a ballistic hardpoint to the left torso of an Atlas is not an Earth-shattering, way too far out of the lore, change to make. Especially considering what the gentleman in the lore above did to their Atlai.
Also, there are pictures on the sarna.net website that the depict an Atlas with a huge ballistic weapon in the right arm and what looks like a missile weapon in the right torso.
Edited by VgerRD, 22 November 2020 - 08:08 PM.