NAP Thunderhead UBAR Replacement Broadhead O-Rings - The UBAR stands for Universal Broadhead Adapter Ring. The UBAR ring is only needed when using the Thunderhead broadhead with any small diameter carbon arrow shaft. The o-ring on the Thunderhead...
NAP Thunderhead UBAR Replacement Broadhead O-Rings - The UBAR stands for Universal Broadhead Adapter Ring. The UBAR ring is only needed when using the Thunderhead broadhead with any small diameter carbon arrow shaft. The o-ring on the Thunderhead...