A tactile reference attachment for releasable attachment to a sports equipment handle to provides a user with tactile biofeedback. includes a tactile reference feature that extends longitudinally along an exterior body surface and is formed with dimensions specifically tailored to harness the user's natural attributes of sensibility, proprioception, and neuromuscular memory to improve a user's accuracy. The tactile reference attachment includes a flexible primary substrate having a plurality of attachment perimeter edges, an exterior surface, an interior surface having an adhesive, a thickness of no more than 4 mm, and at least a first tactile reference indentation having a plurality of perimeter edges, an indentation width of at least 2.0 millimeters and no greater than 5.0 millimeters, an indentation depth of at least 0.5 millimeters and no greater than the indentation width, and an indentation length that is at least five times the indentation width.

A tactile reference attachment for releasable attachment to a sports equipment handle to provides a user with tactile biofeedback. includes a tactile reference feature that extends longitudinally along an exterior body surface and is formed with dimensions specifically tailored to harness the user's natural attributes of sensibility, proprioception, and neuromuscular memory to improve a user's accuracy. The tactile reference attachment includes a flexible primary substrate having a plurality of attachment perimeter edges, an exterior surface, an interior surface having an adhesive, a thickness of no more than 4 mm, and at least a first tactile reference indentation having a plurality of perimeter edges, an indentation width of at least 2.0 millimeters and no greater than 5.0 millimeters, an indentation depth of at least 0.5 millimeters and no greater than the indentation width, and an indentation length that is at least five times the indentation width.

A sanding and smoothing apparatus for pool cue shafts comprises an elongate resilient main body having generally concentrically disposed resilient radially-inner and radially-outer C-shaped members. The apparatus is sized for mating engagement with the tapered shaft of a pool cue received in close fitting conforming relation with the inner surface of the radially-inner C-shaped member. The inner surface of the radially-inner C-shaped member is provided with a suitable abrasive sanding material, which may comprise a sanding sheet or an abrasive coating.

A sanding and smoothing apparatus for pool cue shafts comprises an elongate resilient main body having generally concentrically disposed resilient radially-inner and radially-outer C-shaped members. The apparatus is sized for mating engagement with the tapered shaft of a pool cue received in close fitting conforming relation with the inner surface of the radially-inner C-shaped member. The inner surface of the radially-inner C-shaped member is provided with a suitable abrasive sanding material, which may comprise a sanding sheet or an abrasive coating.

A firearm that provides a user with tactile biofeedback. The firearm includes a tactile reference feature that extends longitudinally along an exterior body surface and is formed with dimensions specifically tailored to harness the user's natural attributes of sensibility, proprioception, and neuromuscular memory to improve a user's accuracy.

A firearm that provides a user with tactile biofeedback. The firearm includes a tactile reference feature that extends longitudinally along an exterior body surface and is formed with dimensions specifically tailored to harness the user's natural attributes of sensibility, proprioception, and neuromuscular memory to improve a user's accuracy.

A constrained frequency resonator is incorporated into the shaft of a striking implement for transferring and, advantageously, amplifying momentum from a striking end to a gripped end of the striking implement, thereby amplifying the sensation of a strike felt at the gripped end. The resonator has a substantially hourglass shape, with wide ends and a narrow waist, and is made of stainless steel or another very hard material. The shape of the resonator causes it to act as a vibration frequency filter that transfers and, preferably, amplifies a certain frequency or band of frequencies. The striking implement may be a golf club, pool cue, or other implement in which frequency transfer to a gripping section is desired.

A cue stick is fitted with an extension adapter secured in its butt end having an external extension connector adapted to matingly engage with an internal extension connector of an extension to secure the extension to the butt end. The external extension connector is not covered by the bumper and can be left on when the extension is fitted to the cue stick, but when the extension is secured, the extension and butt end of the cue stick will be substantially flush with each other, the external extension connector now being located inside of the extension.

A cue stick is fitted with an extension adapter secured in its butt end having an external extension connector adapted to matingly engage with an internal extension connector of an extension to secure the extension to the butt end. The external extension connector is not covered by the bumper and can be left on when the extension is fitted to the cue stick, but when the extension is secured, the extension and butt end of the cue stick will be substantially flush with each other, the external extension connector now being located inside of the extension.

An adapter assembly for use in the cue/billiards sports. The adapter assembly includes a first part, also referred to as a sleeve, and a second part, referred to as an adapter. The adapter assembly inserts into a hollow cue shaft. When the first end of the adapter assembly is inserted into the hollow cue shaft, the adapter of the adapter assembly is configured to receive an insertion pin of a cue handle and to hold the cue handle in position relative to the cue shaft.