Provided is an increased capacity firearm ammunition magazine with a metallic body. The body is dimensioned to compatibly replace a (OEM) polymer or polymer over metal single stack magazine. The body has walls with exterior dimensions compatibly matching those of the OEM magazine and that are thinner than those of the OEM magazine. The thinner walls allow an at least partially laterally offset arrangement of cartridges therein. A longitudinal exterior ridge extends along a forward wall of the body and is configured from the metallic body walls and sized to compensate for forward-to-aft dimensioning difference compared to that of the OEM magazine.

Provided is an increased capacity firearm ammunition magazine with a metallic body. The body is dimensioned to compatibly replace a (OEM) polymer or polymer over metal single stack magazine. The body has walls with exterior dimensions compatibly matching those of the OEM magazine and that are thinner than those of the OEM magazine. The thinner walls allow an at least partially laterally offset arrangement of cartridges therein. A longitudinal exterior ridge extends along a forward wall of the body and is configured from the metallic body walls and sized to compensate for forward-to-aft dimensioning difference compared to that of the OEM magazine.

An increased capacity replacement firearm ammunition magazine for a polymer or polymer-over-metal single stack firearm ammunition magazine for a Glock® handgun, comprises a metallic body dimensioned to compatibly replace the single stack magazine for the Glock® handgun, the single stack magazine having a body having exterior dimensions defined by polymer or polymer-over-metal forward, aft, and side walls, the metallic body having exterior dimensions defined by metallic forward, aft, and side walls, an exterior width dimension of the metallic side walls compatibly matching an exterior width dimension of the side walls of the single stack magazine body, the metallic walls being thinner than the walls of the single stack magazine, the thinner metallic walls allowing an at least partially laterally offset arrangement of cartridges in the metallic body, the forward wall of the metallic body including at least one spacer extending along the forward wall, the spacer sized such that a forward-to-aft exterior dimension of the metallic body compatibly matches a forward-to-aft exterior dimension of the single stack magazine body, a length dimension of the metallic body compatibly matches a length dimension of the single stack magazine body, a cut-out in the metallic body adapted to receive a firearm magazine catch therein, the cut-out including an upper edge, and polymer over at least the upper edge of the cut-out.

An increased capacity replacement firearm ammunition magazine for a polymer or polymer-over-metal single stack firearm ammunition magazine for a Glock® handgun, comprises a metallic body dimensioned to compatibly replace the single stack magazine for the Glock® handgun, the single stack magazine having a body having exterior dimensions defined by polymer or polymer-over-metal forward, aft, and side walls, the metallic body having exterior dimensions defined by metallic forward, aft, and side walls, an exterior width dimension of the metallic side walls compatibly matching an exterior width dimension of the side walls of the single stack magazine body, the metallic walls being thinner than the walls of the single stack magazine, the thinner metallic walls allowing an at least partially laterally offset arrangement of cartridges in the metallic body, the forward wall of the metallic body including at least one spacer extending along the forward wall, the spacer sized such that a forward-to-aft exterior dimension of the metallic body compatibly matches a forward-to-aft exterior dimension of the single stack magazine body, a length dimension of the metallic body compatibly matches a length dimension of the single stack magazine body, a cut-out in the metallic body adapted to receive a firearm magazine catch therein, the cut-out including an upper edge, and polymer over at least the upper edge of the cut-out.

A rifle having a ring mount system including a lower receiver connected to an upper receiver having a barrel; a handguard mounted over and around the barrel, the handguard having a mounting aperture; a barrel nut concentrically provided between the barrel and the handguard; one or more fasteners to secure the handguard to the barrel nut; a keyway groove formed annularly on the barrel nut to receive the fasteners when assembled. The fasteners pass through the mounting aperture of the handguard and securely rest in the keyway groove to align the handguard to the barrel nut and the barrel. The handguard includes a core surrounded by one or more exterior layers defining a shape of the handguard. The core is formed a predetermined thickness and allows the one or more exterior layers to form a desired exterior shape.

A rifle having a ring mount system including a lower receiver connected to an upper receiver having a barrel; a handguard mounted over and around the barrel, the handguard having a mounting aperture; a barrel nut concentrically provided between the barrel and the handguard; one or more fasteners to secure the handguard to the barrel nut; a keyway groove formed annularly on the barrel nut to receive the fasteners when assembled. The fasteners pass through the mounting aperture of the handguard and securely rest in the keyway groove to align the handguard to the barrel nut and the barrel. The handguard includes a core surrounded by one or more exterior layers defining a shape of the handguard. The core is formed a predetermined thickness and allows the one or more exterior layers to form a desired exterior shape.

A rifle includes a magazine well and a barrel. The barrel is detachably coupled to the magazine well. The barrel includes a main body and a forward barrel portion. The forward barrel portion includes a bore, a plurality of perpendicular support structures, a plurality of parallel support structures, a channel wall, and a closed channel wall.

A reticle includes a crosshair, a ranging section, and a targeting section. The ranging section includes a plurality of target height chevrons and a target shoulder width guide. The targeting section includes a plurality of center mass ballistic solution chevrons, a plurality of known length (KL) box shoulder bars, a plurality of KL upper torso bars, a density altitude guide, and a wind compensation guide.

A firearm magazine extension article generally comprises; an extension spring stop that couples to a distal end of an OEM firearm magazine, and an extension body that couples to the extension spring stop. The extension body further comprises locking tabs receivable by the extension spring stop to secure it and the whole of the article to the OEM firearm magazine. To deter any lateral movement by the article and to further secure the article, the extension spring stop comprises a first spring plate receiving orifice to receive a spring plate tab, and the extension body comprises a second spring plate receiving orifice to also receive the spring plate tab.

A firearm magazine extension article generally comprises; an extension spring stop that couples to a distal end of an OEM firearm magazine, and an extension body that couples to the extension spring stop. The extension body further comprises locking tabs receivable by the extension spring stop to secure it and the whole of the article to the OEM firearm magazine. To deter any lateral movement by the article and to further secure the article, the extension spring stop comprises a first spring plate receiving orifice to receive a spring plate tab, and the extension body comprises a second spring plate receiving orifice to also receive the spring plate tab.