[G2shootR]

Just started looking at these heads, and was wondering if the 4 blade model needs a UBAR for Carbon Shafts? Thanks.

 

[Elk52]

no ubar needed. Great broadhead.

 

[5 shot]

No. Ubar's are only needed on heads that use an O ring at the back. Thunderheads and Sat mags are the only two I can think of right now that need them.