NOTE: Required for use with TenPoint rail-less crossbows (TRX 515 and TX 440)

The NEW Alpha-Nock HPX features a Nock Retention Groove that snaps into the TriggerTech trigger box on the TRX 515 & TX 440 allowing the user to both hear & feel the positive engagement of the nock to the string – indicating your arrow is properly locked & loaded in the crossbow. In addition, the “snap-in” design of the Nock Retention Groove eliminates the fit disadvantages & string wear associated with “snap-on” nock designs.

The Alpha-Nock HPX also features an HP Aluminum Bushing for increased strength and accuracy, a deep bowstring groove, a large smooth radius base, and elongated ears.  The crossbow string wraps tightly around the center of the Alpha-Nock HPX resulting in straight nock travel and precision down-range accuracy, while minimizing serving wear.