Reach the indicated level to unlock the item. 
Note: You must have sufficient grey tech to purchase the unlocked weapons.

Advanced Timing Motor: Level 14 
Air Fuel Grenades (weapon): Level 12 
Assault Pack: Level 16 
Auger (weapon): Level 10 
Backlash (berserk): Level 12 
Bullseye (weapon): Level 18 
High Capacity Ammo Belt: Level 8 
HVAP Wraith (weapon): Level 1 
Ironheart (berserk): Level 1 
Kinetic Gloves: Level 6 
Laark (weapon): Level 28 
Overload (berserk): Level 4 
Precision Scope: Level 26 
Psychokinetic Helmet: Level 30 
Rossmore 238 (weapon): Level 2 
Voltaic Body Armor: Level 24