I believe you have to get the nock to match your bolts and even sometimes to match your crossbow ie: some shoot a flat nock, some shoot a moon nock. I would go to the nearest archery shop and get there opinion on your set up. I always use a lighted nock on my arrows so I'm not searching for my arrow in the dark if it buried in tall grass or in a tree. It also is great to watch that red light zip threw the deer and reappear on the other side!