APS Thunder B Core Coupler Rings

Keep your Thunder B simulation grenades running reliably with the APS Thunder B Core Coupler Rings. This replacement parts kit includes precision couplers and O-rings designed to maintain tight seals and consistent performance for CO₂/green-gas Thunder B cores. Ideal for field techs and players who perform regular maintenance, these rings extend the life of your grenade cores and prevent leaks that can ruin a mission.

Key Features

• Replacement couplers & O-rings for APS Thunder B cores

• Precision-molded for secure, leak-free fit

• Extends service life and reliability of grenade cores

• Compact kit for field repairs and maintenance

• Essential spare part for frequent MilSim players