• The new "BT 4" model with marked aluminum top allows for precision tab alignment for string walking

Full one-mile ranging capability

Size: Fits 4 mm (

that fits all TopHat© SL Convex

TenPoint ACU-X Lighted Nocks for HP Bushings 1044841 • The new "BT 4"Super bright for superior visibility, the ACU X Snap On Lighted Nock contains a one piece Nock LED unit that is indexed with the vanes and press fits into the arrows Aluminum Bushing. Upon firing the crossbow, the bowstrings force compresses the two pieces and activates the lighted nock. Deactivate the easy on off ACU X Snap On Lighted Nock by pulling the nock straight out until the light turns off.