HEAT CORE Valve Stem HARD O-Ring Pack (Pack of 3)

This is an harder alternative to UMK-006. Good for extreme aplications or CO2. Replacement HEAT core o-ring in the valve stem (Heat Core 1 schematic, part 10.part) for Milsig markers with HEATCORE (M17 G3, M17 A2, M17 A2 PMC, M5 Magnus, M17 CQC/PMC, M17 ELITE, M17 SMG, M17 XDC, M17 DMR, MK3/Paradigm Pro).

THIS IS NOT COMPATIBLE WITH K-SERIES MK1/2, PARADIGM 1.