- All CharacterStat changes for the Flame Viper from B&T Expanded Enemies Redux have been brought over to Mod Jam.

- The Flame Viper's Inferno Rifle now uses the SMG range table. Overall, this makes it more accurate up close, less so at range than before.

- The Flame Viper's Flame Spit ability has 2 extra turns of cooldown.

- The Flame Scale Vest has been entirely reworked. It no longer grants passive bonuses to HP, Armor or Dodge. It still provides immunity to fire, and also now provides immunity to Viper Crush. Additionally, it has a new ability called Fired Up, which grants the same bonuses as a Flame Viper's Seething ability (the M1 version), including +5 Aim, +5 Crit Chance, +5 Dodge, +1 Armor, and +3 Mobility. These bonuses are not passive; they are granted when Fired Up is activated, for the duration of that turn and the next turn. Activating Fired Up is a free action with a 5 turn cooldown. Any soldier can equip the Flame Scale Vest and use the Fired Up ability, assuming they have a utility or vest slot with which to do so.

- The Flame Scale Vest now has a project in the Proving Grounds. You'll need Hybrid Materials research and the Flame Viper Autopsy to unlock it. Starting it will cost 30 Supplies, 4 Alien Alloys, 1 Elerium Dust, 1 Elerium Core, and 1 Flame Viper Corpse. You'll also need 3 Engineers and 3 Scientists on staff. You get one Flame Scale Vest when the project is done. Additional Flame Scale Vests can then be built in Engineering for 25 Supplies, 3 Alien Alloys, 3 Elerium Dust and 1 Flame Viper Corpse each.

- New ammo type: Seething Rounds. These provide +1 damage, +1 fire damage, and +1 Armor Pierce, but do not set targets on fire.

- Acquiring Seething Rounds begins with the Proving Grounds project. You'll need Hybrid Materials research and the Flame Viper Autopsy to unlock it. Starting it will cost 20 Supplies, 2 Alien Alloys, 1 Elerium Core, and 1 Flame Viper Corpse. You'll also need 3 Engineers and 3 Scientists on staff. You get one Seething Rounds when the project is done. Additional Seething Rounds can then be built in Engineering for 10 Supplies, 1 Alien Alloy, 1 Elerium Dust and 1 Flame Viper Corpse each.

- Inferno Rounds and Viper Rounds can no longer be built.