A12 Carbine Assault Rifle
It can be selected at any part of the game through the weapons selection menu.
The A12 Carbine Assault Rifle is a favorite among special operation units due to its shorter barrel, which increases portability without sacrificing firepower. The fully automatic A12 features a large ammo capacity to balance out its increased rate of fire and is a highly accurate weapon over long distances.
- Description in the in-game PDA in Tomb Raider Underworld