RE: Thunderhead 100 grn 3 blade test results.
Deer slayer, thank you. littleal, the UBAR's are made of aluminum, what they do is make the fit between the small diameter carbons, and the larger washer in the back more uniform. This in turn helps keep more pressure on the back washer wich helps keep the O ring from being damages so badly that the blades become loose. It also helps with alignment problems. If you shoot carbons and Thunderheads I highly recomend you use the UBAR's.
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