UC Defense Manual is a magazine in Starfield. It can be found at various locations in the Settled Systems and grants bonuses when picked up.
BonusesEdit
Bonuses are granted, in order, as the magazines are picked up. This means that the first magazine picked up, regardless of it's location or name, will always grant the first bonus.
Slightly increases magazine size (varies per gun) and weapon bash critical chance (5% per rank) for all Allied Armaments guns.
LocationsEdit
UC Defense Manual 01 Edit
Slightly increases magazine size and weapon bash critical chance for all Allied Armaments guns.
Location: Narion System - Niira - 1-OF-A-KIND Salvage. The building with the large yellow airlock upstairs on metal shelves.
UC Defense Manual 02 Edit
Slightly increases magazine size and weapon bash critical chance for all Allied Armaments guns.
Location: Wolf system - Chtonia - The Den, on metal shelves in the UC station.
UC Defense Manual 03 Edit
Slightly increases magazine size and weapon bash critical chance for all Allied Armaments guns.
Location: UC Marine Barracks in Cydonia - Residental
UC Defense Manual 04 Edit
Slightly increases magazine size and weapon bash critical chance for all Allied Armaments guns.
Location: 
Abandoned Weapon Station (random), in one of the buildings upstairs behind a locked door.
UC Defense Manual 05 Edit
Slightly increases magazine size and weapon bash critical chance for all Allied Armaments guns.
Location: in an Abandoned Robotics Facility. On a white counter.