Abstract: A variable cutting diameter arrowhead includes a first blade, a second blade, and a ferrule, where the first blade and the second blade have a stowed position and a deployed position. The first blade and the second blade may be pivotally attached to the ferrule. In addition, a resilient member may be within a ferrule cavity, where the resilient member applies a force to a blade locking member that engages the first blade and the second blade to retain the blades in a stowed position. When the blades are in a deployed position, the distance between a distal end of the first blade and an outer surface of the ferrule is greater than the distance between the distal end of the first blade and the outer surface of the ferrule is in the stowed position.

Abstract: A variable cutting diameter arrowhead includes a first blade, a second blade, and a ferrule, where the first blade and the second blade have a stowed position and a deployed position. The first blade and the second blade may be pivotally attached to the ferrule. In addition, a resilient member may be within a ferrule cavity, where the resilient member applies a force to a blade locking member that engages the first blade and the second blade to retain the blades in a stowed position. When the blades are in a deployed position, the distance between a distal end of the first blade and an outer surface of the ferrule is greater than the distance between the distal end of the first blade and the outer surface of the ferrule is in the stowed position.

Abstract: A system for aiming an archery bow may include a tube comprising a lumen and configured to removeable engage a bowstring, and a peep sight configured to removeable engage the bowstring, wherein the tube further comprises a radially spaced array of projections, and wherein the projections are square-pyramid-shaped.

Abstract: An archery release includes a hook that receives a force from a hook resilient member to help push the hook away from a moon when the archery release is moved to a released position. The archery release may comprise a body that includes a plurality of finger engagement surfaces, and a release extension that extends outward from between a first finger engagement surface and a second engagement surface. The archery release may also include a head pivotally connected to the release extension, a moon pivotally attached to the release extension, where the moon comprises a generally curved upper surface, a hook pivotally connected to the head, where the hook comprises a hook-shaped portion and a lower engaging surface, and a hook resilient member that applies a force to the hook.

Abstract: A lighting device attached to the head of a golf club. The lighting device can include a housing body, one or more lighting sources, battery and circuitry. The lighting device is attached to the top of the club head such that the light sources are axially aligned with the sweet spot of the face of the club head. As the head of the club is swung toward the ball, a line of light is seen or perceived by the user due to the emitting light sources, defining a target swing path and contact point for the golf ball and the sweet spot.