Abstract: A detachable carrying handle for a firearm, such as a semi-automatic or automatic firearm, having increased range. The detachable carrying handle includes a carrying handle body that defines a window to receive a rear sight base of a rear sight. The carrying handle body further includes a pin opening positioned below the window that is configured to secure the rear sight base of the rear sight to the carrying handle body through the use of a pin. The rear sight base further defines a sight opening and a threaded end that is configured to mate with a threaded opening of an elevation knob positioned in the window. The elevation knob may be used, in operation, to adjust the height of the rear sight. The threaded end of the rear sight base further includes at least one elongated slot that are configured to receive the pin that is used to secure the rear sight base to the carrying handle body.

Abstract: A bolt assembly for a direct gas firearm includes a plurality of sealing rings. In an embodiment, there are three rings with ring gaps cut at about a 45 degree angle and the middle ring is flipped so that the angle of the gap of the middle ring is approximately 90 degrees from the angle of the gap of the two outer rings. In an embodiment, the angle of the ring gap of at least one of the plurality of sealing rings is between 0 and 90 degrees and the ring is configured so that the ring gap is minimized once the ring is installed.

Abstract: A receiver is configured to receiver a tabbed magazine. The receiver includes a receiver well having a slot configured to accept the tab on the tabbed magazine. In operation, the tabbed magazine can be inserted into the receiver well without having to rotate the tabbed magazine into the receiver well. A magazine catch engages a locking feature in a rib of the tabbed magazine so as to support the tabbed magazine in the receiver well. Once the tabbed magazine is empty, the tabbed magazine can be ejected by pressing a magazine release button without the need to rock the tabbed magazine out of the receiver well. The magazine release button can be configured to allow the user to eject the tabbed magazine by pressing the magazine release button on either side of the receiver. Once a loaded tabbed magazine is placed into the receiver well, the user can press a bolt stop button to release a bolt stop.

Abstract: A firearm includes a receiver further including a trigger and a trigger guard. The trigger guard comprises a first end and a second end. The first end is configured to mount to a first arm and a second arm of the receiver and is further configured so that a portion of the trigger guard extends below the first and second arm. The second end is configured to mount to a third and forth arm of the receiver. The first end and the second end extend at angles so as to provide additional room for the user's finger in the enclosure surrounding the trigger.

Abstract: A receiver is configured to receiver a tabbed magazine. The receiver includes a receiver well having a slot configured to accept the tab on the tabbed magazine. In operation, the tabbed magazine can be inserted into the receiver well without having to rotate the tabbed magazine into the receiver well. A magazine catch engages a locking feature in a rib of the tabbed magazine so as to support the tabbed magazine in the receiver well. Once the tabbed magazine is empty, the tabbed magazine can be ejected by pressing a magazine release button without the need to rock the tabbed magazine out of the receiver well. The magazine release button can be configured to allow the user to eject the tabbed magazine by pressing the magazine release button on either side of the receiver. Once a loaded tabbed magazine is placed into the receiver well, the user can press a bolt stop button to release a bolt stop.