Nitrile 90 shore Umerex 50/68 cal Firststrike/Milsig heatcores
options include
*10 x Hi quality Nutril Orings (90 shore) to replace the main valve Oring in your HDRs t4e 50 cal and 68 cal markers
*5 x main Heatcore chamber stem Oring for the Firststike FSC/XP o Milsig/Valkens M17s/CQMFs
£9.99Price
