A liquid outlet link assembly is provided for liquid delivery output rates below 10 l per minute so as to smooth out the flow from a positive displacement pump which has an immediate step pumping rate which is relatively substantially larger than the delivery rate required through the liquid outlet means. The pharmaceutical composition of the present invention comprises a human PRG4 protein, a lubricant fragment, homolog, or isoform thereof, suspended in an ophthalmically acceptable balanced salt solution. In this way, the firearm may be discharged by a warfighter, standing adjacent to a corner, around the corner. In one embodiment, the sidewalls define a width between the first end and the second end that is less than each of the widths of the first and second ends.