Abstract

A round counter for a firearm is provided that includes a display that provides the user with information regarding the number of rounds remaining in the magazine of the firearm. The magazine includes a round follower and a wiper extending from the follower. The wiper contacts a variable resistance sensor, such as a linear potentiometer, that is attached to a sidewall of the magazine. As the round follower and wiper move up and down within the magazine, the wiper contacts the sensor at different positions. The position of the wiper relative to the sensor corresponds to a specific linear distance indicative of the number of rounds remaining in the magazine. Information regarding this position, and consequently the number of remaining rounds is transmitted to the display.

IPC Classes  ?

• F41A 9/64 - Magazines for unbelted ammunition
• F41A 9/62 - Magazines having means for indicating the number of cartridges left in the magazine, e.g. last-round indicators
• F41A 17/06 - Electric or electromechanical safeties
• F41A 17/34 - Magazine safeties

Abstract

A muzzle brake for a firearm includes ports bored or otherwise formed into side surfaces of the muzzle brake. The ports may be formed such that a central axis of each port may be present at an angle that is rearward of perpendicular to the through bore. In this manner, the exhaust opening of each port at the muzzle brake side surface is rearward of the intake opening that connects with the through bore. The ports are located in horizontally and symmetrically opposed pairs, one port in each pair extending through a sidewall on opposite sides of a vertical central plane of the muzzle brake. Each port may comprise two parallel bores. A centerline of each boar is tangent to the diameter of the through bore. The bottom of each port bore has a spherical surface 140. This spheroid termination into the through bore and incidental intersection with adjacent ports results acute angles at each edge leading away from the through bore and into the ports.

IPC Classes  ?

• F41A 21/36 - Muzzle attachments or glands for recoil reduction
• F41A 21/38 - Muzzle attachments or glands for recoil reduction adjustable
• F41A 21/00 - Barrels or gun tubes; Muzzle attachments; Barrel mounting means
• F41A 21/30 - Silencers
• F41A 5/26 - Arrangements or systems for bleeding the gas from the barrel

Abstract

An integrated magazine and bolt release mechanism that is intended to automate the operations of magazine release when empty, and bolt release when a loaded magazine is inserted into the rifle. The release mechanism may include a mechanical switch device. The mechanical switch device may be a lever that is able to identify the presence of ammunition. By way of mechanical linkage, the system is able to control the magazine catch surface to either maintain or expel a magazine. The linkage facilitate the transition of vertical motion, imparted by the magazine body and follower to the lever into horizontal motion of an arm to move the magazine catch in and out of engagement with the magazine's locking surface. Upward vertical motion of the lever may actuate the bolt catch surface by means of a mechanical link that serves to reverse the direction of vertical motion. As the magazine body moves upward, the lever impinges on the arm that forces the bolt catch downward, to release the locked bolt group.

IPC Classes  ?

• F41A 9/59 - Ejectors for clips or magazines, e.g. when empty
• F41A 17/36 - Magazine safeties locking the gun in a safety condition when the magazine is empty or removed

Abstract

A buffer assembly for a firearm has a tubular receiver extension. A damper assembly is positioned within the receiver extension adjacent the receiver extension rear end, and a spring is positioned within the receiver extension with the rear end of the spring surrounding the damper assembly. A buffer is positioned within the receiver extension at the opposite end of the spring from the damper assembly. The receiver extension has a liner that surrounds the spring creating a layer between the spring and the receiver extension. The liner may be a friction reducing material such as a polymer material.

IPC Classes  ?

• F41A 3/82 - Coil spring buffers
• F41A 1/08 - Recoilless guns, i.e. guns having propulsion means producing no recoil
• F41A 1/10 - Recoilless guns, i.e. guns having propulsion means producing no recoil a counter projectile being used to balance recoil
• F41A 3/78 - Bolt buffer or recuperator means
• F41A 3/84 - Coil spring buffers mounted within the gun stock
• F41A 3/86 - Coil spring buffers mounted under the barrel
• F41C 23/06 - Stocks specially adapted for recoil reduction

Abstract

A receiver for a firearm may include a linkage that integrates movement of left and right forward assists. The receiver may include a linkage connecting one or both of the forward assists to a bolt catch. The receiver may included both a connection between the left and right forward assists as well as a connection between one or both of the forward assists and the bolt catch. The receiver may include a linkage connecting the forward assist mechanism with the bolt catch mechanism such that actuation of the forward assist mechanism moves the bolt carrier and moves the bolt catch mechanism from the engaged position to the disengaged position.

IPC Classes  ?

• F41A 3/12 - Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
• F41A 3/68 - Bolt stops, i.e. means for limiting bolt opening movement
• F41A 35/06 - Adaptation of guns to both right and left hand use