Abstract: A firearm loader may be used to transfer at least one cartridge to a firearm. The loader includes a main body comprising a proximal end and a distal end and a follower disposed inside the main body. The loader may include an engaged configuration wherein the loader is at least partially inserted into a firearm. The proximal end may include an opening. In the engaged configuration, the opening approximately faces a magazine of the firearm.

Abstract: A firearm receiver assembly includes a receiver body, a threaded mount at a rear portion of the receiver body, a magazine release assembly including a magazine release portion on at least one side of the receiver body, a bolt release assembly including a bolt release central portion and a bolt release portion on at least one side of the receiver body, and a safety selector assembly including a safety portion on at least one side of the receiver body. The bolt release central portion translates vertically within a cavity of the receiver body.

Abstract: A ratcheting magazine for a firearm includes a main body, a floor plate, and an insert disposed inside the main body. The insert includes a front column of supports, a rear column of supports, and a sliding column of supports. The sliding column of supports includes a plurality of positions relative to the insert such that the sliding column of supports moves linearly relative to the insert.

Abstract: A follower for a magazine of a firearm includes an underside for attachment to a spring within the magazine, a spine extending downward from a rear part of the follower, and an upper surface for interfacing with at least one cartridge inserted into the magazine. The upper surface includes a top portion and a bottom portion, and the bottom portion includes a curved surface.

Abstract: A follower for a magazine of a firearm includes an underside for attachment to a spring within the magazine, a spine extending downward from a rear part of the follower, and an upper surface for interfacing with at least one cartridge inserted into the magazine. The upper surface includes a top portion and a bottom portion, and the bottom portion includes a curved surface.

Abstract: A pivot pin for a firearm includes a proximal end, a distal end, a cylindrical surface extending between the proximal end and the distal end, a head disposed at the distal end where the head includes a flat portion, a groove extending along at least a portion of a length of the cylindrical surface, and a hole extending through the pivot pin. The hole is located between the groove and the proximal end.

Abstract: A vehicle for transporting a passenger in a standing position includes a frame, a rear axle assembly disposed at a rear end of the frame, a front suspension assembly disposed at a front end of the frame, a rear deck attached to the frame to accommodate a trailing foot of the passenger, a front deck attached to the frame to accommodate a leading foot of the passenger, and a driveshaft extending forward from the rear axle assembly such that the driveshaft transmits power to the rear axle assembly.

Abstract: A firearm assembly includes an insert including a front strap, a leading member, a dowel member located at a lower end of the leading member, and a floorplate flexibly coupled to a lower end of the front strap, wherein the front strap and leading member extend between an upper end of the insert and a lower end of the insert; a follower configured to move vertically in relation to the insert; a rear strap removably attachable to the floorplate; and a spring disposed above the floorplate, wherein the front strap and rear strap are internally disposed in the spring and the follower is removably attached to an upper end of the spring.

Abstract: A forward brace assembly for a firearm includes a forward portion designed to interface with an operator's off hand and an aft panel extending rearward from the forward portion. At least a portion of the forward brace assembly is attached to an underside of a handguard of the firearm. The aft panel prevents the operator's off hand from wrapping around a rear side of the forward portion.

Abstract: An operating system for a firearm includes a forward bolt includes a forward bolt cavity, a carrier disposed on a rear side of the forward bolt, the carrier including a carrier cavity, a short cam pin including (i) a forward section that is at least partially disposed within the forward bolt cavity and (ii) a rear section that is at least partially disposed within the carrier cavity, a plurality of bearings that interface with the forward bolt, a retracted configuration where the short cam pin is in a rear position relative to the forward bolt, and a deployed configuration where the short cam pin is in a forward position relative to the forward bolt.

Abstract: A malfunction insert is for a firearm that includes a magazine. The malfunction insert includes a narrow end comprising a narrow edge, a concave surface disposed at an opposite end of the malfunction insert from the narrow end, and a central member that connects the concave surface and the narrow end. The malfunction insert is configured to be inserted into the magazine.

Abstract: A buffer extension assembly may include a body having at least one face and a cylindrical surface. The body may be disposed between and contact at least one of a buffer and a bolt carrier group such that the body increases both the effective mass and the effective length of the buffer. The body includes at least one hole extending along a length of the body.

Abstract: A lock release lever pin assembly for an adjustable buttstock assembly of a firearm, wherein the lock release lever pin assembly includes a lock release lever pin including a first end and a second end and a lock pin nut that engages the first end of the lock release lever pin. The first end of the lock release lever pin includes at least one insertion portion and at least one retaining portion.

Abstract: A firearm operating system includes a housing, a central pivoting member disposed within the housing, a trigger including a portion disposed within the housing and a portion extending outside the housing such that the portion of the trigger within the housing includes a hole and at least one finger that extends in a first direction from the hole. Due to movement of the trigger, the at least one finger presses against the central pivoting member to cause the central pivoting member to rotate.

Abstract: A firearm assembly includes an insert including a front strap, a leading member, a dowel member located at a lower end of the leading member, and a floorplate flexibly coupled to a lower end of the front strap, wherein the front strap and leading member extend between an upper end of the insert and a lower end of the insert; a follower configured to move vertically in relation to the insert; a rear strap removably attachable to the floorplate; and a spring disposed above the floorplate, wherein the front strap and rear strap are internally disposed in the spring and the follower is removably attached to an upper end of the spring.

Abstract: An operating system for a firearm includes a trigger, a hammer, a disconnector, a pivoting arm, and a lower member. The trigger includes a lower portion, an upper portion, and a trigger pivot. The disconnector includes a lower portion, an upper portion, and a disconnector pivot. The pivoting arm includes a forward protrusion, a pivoting arm opening, and a pin extending through the pivoting arm opening. The lower member includes a lower member opening and a pin hole that is coaxial with the trigger pivot and the disconnector pivot. At least a portion of the trigger and at least a portion of the disconnector are disposed within the lower member opening. Motion of the trigger causes the forward protrusion of the pivoting arm to engage a bolt carrier group and hold the bolt carrier group in an open position.

Abstract: A firearm loader may be used to transfer at least one cartridge to a firearm. The loader includes a main body comprising a proximal end and a distal end and a follower disposed inside the main body. The loader may include an engaged configuration wherein the loader is at least partially inserted into a firearm. The proximal end may include an opening. In the engaged configuration, the opening approximately faces a magazine of the firearm.

Abstract: A firearm operating system includes a housing, a central pivoting member disposed within the housing, a trigger including a portion disposed within the housing and a portion extending outside the housing such that the portion of the trigger within the housing includes a hole and at least one finger that extends in a first direction from the hole. Due to movement of the trigger, the at least one finger presses against the central pivoting member to cause the central pivoting member to rotate.

Abstract: A hybrid molded assembly includes a trigger comprising a trigger skeleton and a trigger molded portion that at least partially encompasses the trigger skeleton, a hammer comprising a hammer skeleton and a hammer molded portion that at least partially encompasses the hammer skeleton, and a disconnector comprising a disconnector skeleton and a disconnector molded portion that at least partially encompasses the disconnector skeleton.

Abstract: A buffer extension assembly may include a body having at least one face and a cylindrical surface. The body may be disposed between and contact at least one of a buffer and a bolt carrier group such that the body increases both the effective mass and the effective length of the buffer. The body includes at least one hole extending along a length of the body.