Abstract: A gas regulator for a rifle, having: an elongated member having a first end and a second end; a head portion located at the first end; a pair of openings passing through the elongated member, wherein one of the pair of openings is larger than the other one of the pair of openings; a recessed area located at the second end; and wherein the gas regulator is located in a front sight of the rifle, the sight, comprising: a mounting block; a tower pivotally mounted to the mounting block for movement between a first position and a second position; a first locking mechanism comprising a plurality of spring biased members for retaining the tower in the first position and the second position, the plurality of spring biased members being configured to allow movement of the tower between the first position and the second position in response to a force applied to the tower; and a second locking mechanism configured to lock the tower in the second position, wherein the second locking mechanism must be manually released be

Abstract: A gas regulator for a rifle, having: an elongated member having a first end and a second end; a head portion located at the first end; a pair of openings passing through the elongated member, wherein one of the pair of openings is larger than the other one of the pair of openings; a recessed area located at the second end; and a pair of detent openings located on a portion of the elongated member, the pair of detent openings being spaced from each other and located within another recessed area located on a surface of the elongated member between the first end and the second end, wherein one of the pair of detent openings is closer to the first end than the other one of the pair of detent openings.

Abstract: A gas regulator for a rifle, having: an elongated member having a first end and a second end; a head portion located at the first end; a pair of openings passing through the elongated member, wherein one of the pair of openings is larger than the other one of the pair of openings; a recessed area located at the second end; and wherein the gas regulator is located in a front sight of the rifle, the sight, comprising: a mounting block; a tower pivotally mounted to the mounting block for movement between a first position and a second position; a first locking mechanism comprising a plurality of spring biased members for retaining the tower in the first position and the second position, the plurality of spring biased members being configured to allow movement of the tower between the first position and the second position in response to a force applied to the tower; and a second locking mechanism configured to lock the tower in the second position, wherein the second locking mechanism must be manually released be

Abstract: A gas regulator for a rifle, having: an elongated member having a first end and a second end; a head portion located at the first end; a pair of openings passing through the elongated member, wherein one of the pair of openings is larger than the other one of the pair of openings; a recessed area located at the second end; and a pair of detent openings located on a portion of the elongated member, the pair of detent openings being spaced from each other and located within another recessed area located on a surface of the elongated member between the first end and the second end, wherein one of the pair of detent openings is closer to the first end than the other one of the pair of detent openings.

Abstract: A front sight for a weapon, the front sight having: a mounting block; a tower pivotally mounted to the mounting block for movement between a first position and a second position; a first locking mechanism comprising a plurality of spring biased members for retaining the tower in the first position and the second position, the plurality of spring biased members being configured to allow movement of the tower between the first position and the second position in response to a force applied to the tower; and a second locking mechanism configured to lock the tower in the second position, wherein the second locking mechanism must be manually released before the tower can be moved from the second position to the first position.

Abstract: An upper receiver for a weapon, the upper receiver having a plurality channels each being oriented in a first direction and wherein each of the plurality of channels intersect an elongated channel extending in a second direction; a modular rail having a pair of securement features configured to be slidably received within a pair of the plurality of channels such that modular rail can slide in the pair of the plurality of channels in the first direction until the pair of features can slide within the elongated channel in the second direction.

Abstract: A gas regulator for a rifle is provided, the gas regulator having: an elongated member having a first end and a second end; a head portion located at the first end; a pair of openings passing through the elongated member, wherein one of the pair of openings is larger than the other one of the pair of openings; and a recessed area located at the second end.

Abstract: A modular rail system for an upper receiver of a firearm is provided, the modular rail system having: a bottom portion configured to be removably secured to the upper receiver, wherein the bottom portion has an integrally formed bottom rail and a forward portion located forward of a top rail of the upper receiver; an upper rail extension configured to be removably secured to the forward portion of the bottom portion; and a release mechanism for releasably securing the upper portion to the forward portion of the bottom portion.

Abstract: A front sight for a weapon, the front sight having: a mounting block; a tower pivotally mounted to the mounting block for movement between a first position and a second position; a first locking mechanism comprising a plurality of spring biased members for retaining the tower in the first position and the second position, the plurality of spring biased members being configured to allow movement of the tower between the first position and the second position in response to a force applied to the tower; and a second locking mechanism configured to lock the tower in the second position, wherein the second locking mechanism must be manually released before the tower can be moved from the second position to the first position.

Abstract: A front sight for a weapon, the front sight having: a mounting block; a tower pivotally mounted to the mounting block for movement between a first position and a second position; a first locking mechanism comprising a plurality of spring biased members for retaining the tower in the first position and the second position, the plurality of spring biased members being configured to allow movement of the tower between the first position and the second position in response to a force applied to the tower; and a second locking mechanism configured to lock the tower in the second position, wherein the second locking mechanism must be manually released before the tower can be moved from the second position to the first position.

Abstract: A modular rail system for an upper receiver of a firearm is provided, the modular rail system having: a bottom portion configured to be removably secured to the upper receiver, wherein the bottom portion has an integrally formed bottom rail and a forward portion located forward of a top rail of the upper receiver; an upper rail extension configured to be removably secured to the forward portion of the bottom portion; and a release mechanism for releasably securing the upper portion to the forward portion of the bottom portion.

Abstract: A gas regulator for a rifle is provided, the gas regulator having: an elongated member having a first end and a second end; a head portion located at the first end; a pair of openings passing through the elongated member, wherein one of the pair of openings is larger than the other one of the pair of openings; and a recessed area located at the second end.

Abstract: A front sight for a weapon, the front sight having: a mounting block; a tower pivotally mounted to the mounting block for movement between a first position and a second position; a first locking mechanism comprising a plurality of spring biased members for retaining the tower in the first position and the second position, the plurality of spring biased members being configured to allow movement of the tower between the first position and the second position in response to a force applied to the tower; and a second locking mechanism configured to lock the tower in the second position, wherein the second locking mechanism must be manually released before the tower can be moved from the second position to the first position.

Abstract: An upper receiver for a weapon, the upper receiver having a plurality channels each being oriented in a first direction and wherein each of the plurality of channels intersect an elongated channel extending in a second direction; a modular rail having a pair of securement features configured to be slidably received within a pair of the plurality of channels such that modular rail can slide in the pair of the plurality of channels in the first direction until the pair of features can slide within the elongated channel in the second direction.

Abstract: A bolt, having: an extractor pivotally thereto for movement between at least a first position and a second position, a hook member located at a distal end of the extractor, wherein the hook member is at least partially received within a pocket on a muzzle end of the bolt and the hook member moves away from a center line of the bolt as the hook member is moved from the first position towards the second position, wherein a bottom of the pocket is recessed within a first range A in a first direction from the muzzle and the hook member has an axial thickness parallel to the center line within a first range A? and wherein the hook member is flush with the muzzle when the hook member is in the second position.