The invention relates to guns and is aimed at enhancing the ergonomics of the firearm, having the magazine, located eccentrically relative to the vertical plane.

These results are achieved by the fact that the receiver contains an eccentric thickening in which the receptacle of the magazine is located and the thickening itself has bevels, which makes the outline of the receiver smooth, thereby excluding the possibility of the receptacle of the magazine catching on surrounding objects.

A receiver for use in the manufacture of a lightweight and strong machine-gun comprising a left shell that includes a milled, single-piece metal flat body of a predefined peripheral shape that is substantially rectangular, and a right shell including a milled, single-piece metal flat body, including said right shell formed in size and shape to be joined together symmetrically with said left shell, to form a compartment, said left shell and said right shell including the same size and shape dovetail interlocking joints, milled in said left shell and said right shell at the same locations, said left shell joined to said right shell solely by dovetail fasteners, without welding, without rivets, and without nuts and bolts, forming a rigid, strong, lightweight machine-gun receiver. First and second takedown pins are also used to fasten the left shell to the right shell after the left and right shells have been interlocked together by the dovetail interlocking joints to prevent vertical movement between the left shell and the right shell.

A receiver for use in the manufacture of a lightweight and strong machine-gun comprising a left shell that includes a milled, single-piece metal flat body of a predefined peripheral shape that is substantially rectangular, and a right shell including a milled, single-piece metal flat body, including said right shell formed in size and shape to be joined together symmetrically with said left shell, to form a compartment, said left shell and said right shell including the same size and shape dovetail interlocking joints, milled in said left shell and said right shell at the same locations, said left shell joined to said right shell solely by dovetail fasteners, without welding, without rivets, and without nuts and bolts, forming a rigid, strong, lightweight machine-gun receiver. First and second takedown pins are also used to fasten the left shell to the right shell after the left and right shells have been interlocked together by the dovetail interlocking joints to prevent vertical movement between the left shell and the right shell.

A modular firearm grip assembly has a frame defined by a front grip strap and a rear grip strap. The front grip strap defines a front lateral attachment point and rear lateral attachment point, and the rear grip strap has a first attachment coupling interface. A grip extension defined by a front extension strap and a rear extension strap is coupled to the frame at the respective one of the front lateral attachment point and the rear lateral attachment point thereof. The grip extension includes a second attachment coupling interface engaged to the first attachment coupling interface of the frame.

A modular firearm grip assembly has a frame defined by a front grip strap and a rear grip strap. The front grip strap defines a front lateral attachment point and rear lateral attachment point, and the rear grip strap has a first attachment coupling interface. A grip extension defined by a front extension strap and a rear extension strap is coupled to the frame at the respective one of the front lateral attachment point and the rear lateral attachment point thereof. The grip extension includes a second attachment coupling interface engaged to the first attachment coupling interface of the frame.

A firearm with a lower receiver and bolt catch. The lower receiver may include a first external wall portion that is on the left side of the firearm and a second external wall portion on the right side of the firearm when a front of the lower receiver is facing forward, the rear of lower receiver is facing rearward, the bottom of the lower receiver is facing downward, and the firearm is in a firing position. The firearm may further include a bolt catch for preventing forward movement of the bolt. The bolt catch may include a first external bolt catch portion that exits the first external wall portion of the receiver on the left side of the firearm and a second external bolt catch portion that exits the second external wall portion of the receiver on the right side of the firearm. The bolt catch may further include an internal bolt catch portion within the lower receiver that connects the first external bolt catch portion and the second external bolt catch portion, wherein at least a first portion of the internal bolt catch portion extends in at least one of a rearward direction towards the rear of the receiver, or a downward direction towards the bottom of the lower receiver.

A firearm with a lower receiver and bolt catch. The lower receiver may include a first external wall portion that is on the left side of the firearm and a second external wall portion on the right side of the firearm when a front of the lower receiver is facing forward, the rear of lower receiver is facing rearward, the bottom of the lower receiver is facing downward, and the firearm is in a firing position. The firearm may further include a bolt catch for preventing forward movement of the bolt. The bolt catch may include a first external bolt catch portion that exits the first external wall portion of the receiver on the left side of the firearm and a second external bolt catch portion that exits the second external wall portion of the receiver on the right side of the firearm. The bolt catch may further include an internal bolt catch portion within the lower receiver that connects the first external bolt catch portion and the second external bolt catch portion, wherein at least a first portion of the internal bolt catch portion extends in at least one of a rearward direction towards the rear of the receiver, or a downward direction towards the bottom of the lower receiver.

A receiver and a method for manufacturing it are disclosed. The receiver contains a first material at least partially surrounded by a second material, wherein the first material has a first melting and the second material has a second melting point, wherein the first melting point is lower than the second melting point. The method disclosed teaches how to manufacture the receiver.

A receiver and a method for manufacturing it are disclosed. The receiver contains a first material at least partially surrounded by a second material, wherein the first material has a first melting and the second material has a second melting point, wherein the first melting point is lower than the second melting point. The method disclosed teaches how to manufacture the receiver.

A firearm with a lower receiver and bolt catch. The lower receiver may include a first external wall portion that is on the left side of the firearm and a second external wall portion on the right side of the firearm when a front of the lower receiver is facing forward, the rear of lower receiver is facing rearward, the bottom of the lower receiver is facing downward, and the firearm is in a firing position. The firearm may further include a bolt catch for preventing forward movement of the bolt. The bolt catch may include a first external bolt catch portion that exits the first external wall portion of the receiver on the left side of the firearm and a second external bolt catch portion that exits the second external wall portion of the receiver on the right side of the firearm. The bolt catch may further include an internal bolt catch portion within the lower receiver that connects the first external bolt catch portion and the second external bolt catch portion, wherein at least a first portion of the internal bolt catch portion extends in at least one of a rearward direction towards the rear of the receiver, or a downward direction towards the bottom of the lower receiver.