Abstract: A firearm receiver assembly is disclosed herein. The firearm receiver assembly includes a receiver having at least two pillar apertures. The firearm receiver assembly also includes a chassis having a top portion, a bottom portion, and a side portion. The receiver is configured to be set within the top portion. The firearm receiver assembly also includes a bottom metal having a top side, a bottom side, a proximate end, and a distal end. More so, the firearm receiver assembly includes at least two integrated pillars extending from the top side of the bottom metal. The at least two integrated pillars are configured to align with the pillar apertures of the receiver.

Abstract: A bolt stop assembly is disclosed herein. The bolt stop assembly may include a receiver and a bolt. The receiver may include a plurality of channels extending longitudinally to a firearm barrel. The bolt may include a series of lugs on a distal end of the bolt configured to traverse the plurality of channels. The bolt stop assembly may include an aperture adjacent to the breech end of the receiver, and an actuating bolt stop set within the aperture. The actuating bolt stop actuates around a pivot pin within a pin hole set parallel to a longitudinal axis. The actuating bolt stop may include an interior surface where a biasing member is disposed between the interior surface and the receiver.

Abstract: A firearm receiver assembly is disclosed herein. The firearm receiver assembly includes a receiver having at least two pillar apertures. The firearm receiver assembly also includes a chassis having a top portion, a bottom portion, and a side portion. The receiver is configured to be set within the top portion. The firearm receiver assembly also includes a bottom metal having a top side, a bottom side, a proximate end, and a distal end. More so, the firearm receiver assembly includes at least two integrated pillars extending from the top side of the bottom metal. The at least two integrated pillars are configured to align with the pillar apertures of the receiver.

Abstract: A bolt stop assembly is disclosed herein. The bolt stop assembly may include a receiver and a bolt. The receiver may include a plurality of channels extending longitudinally to a firearm barrel. The bolt may include a series of lugs on a distal end of the bolt configured to traverse the plurality of channels. The bolt stop assembly may include an aperture adjacent to the breech end of the receiver, and an actuating bolt stop set within the aperture. The actuating bolt stop actuates around a pivot pin within a pin hole set parallel to a longitudinal axis. The actuating bolt stop may include an interior surface where a biasing member is disposed between the interior surface and the receiver.