Syringes and methods of syringe manufacturing

A method of manufacturing a syringe having a fluid reservoir, the method comprising:

• injection molding a syringe about a core having a plurality of lengthwise ribs about a tip region;
• and
• withdrawing the core from the syringe, wherein the ribs score a plurality of grooves along the fluid reservoir.

A barrel for a syringe to be used with a piston and a fluid, the barrel comprising:

• a sidewall having a first opening, a second opening from which the fluid is dispensed, a fluid chamber defined between the piston and said second opening that is in fluid communication with said second opening, and an inwardly-facing surface centered about a longitudinal axis extending from said first opening to said second opening;
• and
• a plurality of axial grooves defined in said inwardly-facing surface and extending along said inwardly-facing surface substantially parallel to said longitudinal axis, said inwardly-facing surface and said axial grooves configured to be contacted by the fluid in the fluid chamber, said axial grooves configured to provide a fluid seal with a periphery of the piston to inhibit fluid leakage past the piston.