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If you’re running an Ops-Core FAST helmet with ARC rails, this IDOGEAR adapter set is what you need to mount Peltor headsets.

Model HA3811, mix of plastic and metal, unisex fit.

Brand new with tags, never used.
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No MPN or UPC, but it’s solid gear.
Locks in clean, holds tight.

Perfect for airsoft, range days, or real-deal ops.

4.8 out of 5