Do they exist? removeable pin for slin

[mr.nitro]

I was wondering if their is such a thing as insulin syringes(1/2 cc, 50unit) that have removeable pins. cause those fuckers get really dull after drawing from 2 bottles.(igf and dilutant)

 

[Satva1100]

never seen one. but you can fill one syringe, then take the plunger out of a new one and spray the stuff into the new syringe, and then put the plunger back in.