Precision syringe plunger with separately manufactured and irreversibly coupled plunger arm and plunger rod

A method of manufacturing a syringe plunger, comprising:

• molding or printing a plunger rod including a base formed at a proximal end of the plunger rod, the plunger rod further including a first interference fit connector formed below the base at the proximal end of the plunger rod, the plunger rod configured to extend longitudinally from the base into a syringe barrel;
• molding or printing a plunger arm including a second interference fit connector formed at a proximal end of the plunger arm, the second interference fit connector configured to be coupled to the first interference fit connector so that the plunger arm extends longitudinally from the base along an outer surface of the syringe barrel, the plunger arm further including a projection formed at a distal end of the plunger arm, the projection configured to receive an applied force that causes an entirety of the syringe plunger to move relative to the syringe barrel so that the plunger rod is actuated through a portion of the syringe barrel;
• and
• irreversibly coupling the plunger rod to the plunger arm by forcing the first and second interference fit connectors together.