Precision Syringe

A syringe plunger, comprising:

• a base;
• an internal portion having a first end coupled to the base, the internal portion configured to extend longitudinally into a syringe barrel and having a second end configured to push a fluid out of the syringe barrel;
• and
• an external portion having a first end coupled to the base, the external portion configured to extend longitudinally along an outer surface of the syringe barrel and having a projection disposed at a second end of the external portion, the projection configured to receive an applied force that causes an entirety of the plunger to move relative to the syringe barrel so that the second end of the internal portion is actuated through a portion of the syringe barrel, wherein a distance between the second end of the internal portion and the projection is less than a distance between the base and the projection.

A syringe, comprising:

• a syringe barrel;
• a guide disposed upon the outer surface of the syringe barrel;
• and
• a plunger, the plunger having a base, an internal portion, and an external portion, the internal portion having a first end coupled to the base, the internal portion extending longitudinally into the syringe barrel and having a second end configured to push a fluid out of the syringe barrel,
• the external portion having a first end coupled to the base, the external portion extending longitudinally along an outer surface of the syringe barrel and including an indentation that fits over at least a portion of the guide so that the external portion slides along the guide in a longitudinal direction relative to the syringe barrel, the external portion having a second end configured to receive an applied force that causes an entirety of the plunger to move relative to the syringe barrel so that the second end of the internal portion is actuated through a portion of the syringe barrel.