Impact: You gain a +1 damage bullet to all bullets (this still only applies once to a weapon like a shotgun) per rank.
Sentry: The scorpion turret gains a +1 damage bonus to each bullet fired.
Refire: At rank 1 you recover 1 power point per 8 kills gained. At rank 2 you recover 1 power point per 6 kills gained. At rank 3 you recover 1 power point per 4 kills gained. At rank 4 you recover 1 power point per 2 kills gained.
Requirements: At least 4 ranks in the infantry tree.
Assault: All assault rifles gain +3 ammo capacity per rank. Additionally, you can reduce the recoil by 1 point per rank.
Guided missile: the scorpion turret fires a guided missile. This uses the same attack skill as the scorpion turret and has the same range (24/48/96). The missile deals 4d8 damage on impact, and has a blast radius of one hex, allowing an agility check at -2 to get out of the way. At rank 1 the turret fires one missile in the first round. At rank 2 it fires 2 missiles, one in the first round and another in the 4th. At rank 3 it fires 3 missiles, in the 1st, 3rd and 5th rounds. With the last rank the turret fires a missile every round. These missiles are not subject to the normal 180 degrees forward, and have 360 degree facing.
Requirements: At least 6 ranks in the infantry tree.