MagnaTrooper (MAGTR-A01) was basic humanoid-shaped droid design which was used in the production of various droid models - both for military and civilian purposes - by different droid manufacturers. Full production ID for this design was droid.assassin_droid.magnatrooper_a01. Like most humanoid-shaped models, it allowed to install wide array of internal weapons and protective shileds, to complement its abilitiy to use most blasters, rifles and melee weapons.
Although this design was first introduced before the destruction of Taris

Destruction of Taris Event Jedi Civil War

by the Sith Empire

Revan's Sith Empire Organization Galaxy-Wide Organizations

, it was still in active use 300 years later during the Cold War

The Cold War Event Cold War (3653BBY - 3642BBY)

.