The Reliability Upgrade can be purchased, and immediately takes effect after having been bought. The effects are listed in the "Upgrades" section of the game menu under the sub-heading "Repair Manual", like this:
- - 20% Weapon Degradation
- + 20% Unjam Speed
This upgrade is the quintessential element for maximum survivability. When one can not afford to have a jam in the middle of an intense fire fight, it is recommended to buy this upgrade. This is also very helpful for the higher difficulty levels, since a jammed weapon in the wrong place at the wrong time could result in death.
See also: Accuracy Upgrade