Abstract: Embodiments of a magazine coupler include a coupler body, a first magazine attachment interface coupled to the coupler body and configured to removably mount a lower end portion of the first firearm magazine to the coupler body, a second magazine attachment interface coupled to the coupler body and configured to removably mount a lower end portion of the second firearm magazine to the coupler body, and a finger aperture extending formed through the coupler body. The finger aperture is sized and shaped to enable a user or firearm operator to spin the magazine coupler about a finger of the user when inserted through the finger aperture to vary which of the first firearm magazine and the second firearm magazine resides in an upright orientation for insertion into a well of a firearm when the magazine coupler resides in a deployed state.

Abstract: An adjustable firearm generally comprises a firearm body comprising an adjustable handgrip to vary a handgrip angle with respect to a barrel of the firearm, wherein the adjustable handgrip comprises a substrate and an overlay. In an embodiment, the substrate affixes to the firearm body and the overlay couples to the substrate at one of at least multiple angles with respect to a firearm barrel. In another embodiment, a firearm body comprises an integrated substrate configured to receive an overlay, wherein the overlay couples to the substrate at one of at least multiple angles with respect to a firearm barrel. Among various representative embodiments, the substrate or overlay may comprise a fixed geometry and the substrate or overlay may comprise an adjustment mechanism to couple one to the other at various positions. The present invention may comprise a method for manufacturing, packaging, marketing, distributing, and/or selling the adjustable firearm.

Abstract: An adjustable firearm generally comprises a firearm body comprising an adjustable handgrip to vary a handgrip angle with respect to a barrel of the firearm, wherein the adjustable handgrip comprises a substrate and an overlay. In an embodiment, the substrate affixes to the firearm body and the overlay couples to the substrate at one of at least multiple angles with respect to a firearm barrel. In another embodiment, a firearm body comprises an integrated substrate configured to receive an overlay, wherein the overlay couples to the substrate at one of at least multiple angles with respect to a firearm barrel. Among various representative embodiments, the substrate or overlay may comprise a fixed geometry and the substrate or overlay may comprise an adjustment mechanism to couple one to the other at various positions. The present invention may comprise a method for manufacturing, packaging, marketing, distributing, and/or selling the adjustable firearm.

Abstract: A quick loading firearm magazine generally comprises; a magazine casing, a chambering mechanism, and a chambering mechanism actuator. The magazine casing is configured to receive a plurality of firearm cartridges and the casing is dimensioned to couple to a magazine well of a firearm. The chambering mechanism, such as a spring, provides a sufficient force to loaded firearm cartridges to assure the cartridges are chamberable within the firearm, and may further comprise a spring follower coupled to the spring to further assist guiding the loaded cartridges. The chambering mechanism actuator allows a user to manually actuate the chambering mechanism and may comprise a casing slide that suitably engages the casing, and is configured to; slide along the firearm magazine body, engage the spring follower through a longitudinal casing slot, and maintain the spring follower in a substantially normal position relative to the casing sidewall.