Rifle conversion devices and method

A method for converting a rifle that has a receiver assembly comprising an upper receiver assembly including an upper receiver and action components and a barrel, and a lower receiver assembly that includes a lower receiver and fire controls, the lower receiver having a plurality of surfaces and including a magazine well, the upper receiver assembly and the lower receiver assembly forming an original configuration of the rifle, comprising:

• a) removably installing a conversion device onto the lower receiver by attaching the conversion device to the rifle by engaging multiple surfaces of the plurality of surfaces of the lower receiver, including surfaces of the magazine well, with the conversion device to removably fix the conversion device onto the magazine well;
• b) wherein the conversion device includes or is configured to connect with one or more accessories that do not contact the upper receiver assembly;
• c) wherein said conversion device is supported on said lower receiver only and does not contact the upper receiver assembly;
• and
• d) detaching the conversion device from the rifle to restore the rifle to the original configuration;
• e) wherein, when the conversion device is detached from the magazine well, the rifle remains free of the conversion device;
• f) wherein the conversion device comprises a mount piece, and wherein removably installing the conversion device comprises installing the mount piece onto the magazine well of the lower receiver by engaging the multiple surfaces of the plurality of surfaces of the lower receiver, including the surfaces of the magazine well, with the mount piece;
• g) wherein the magazine well comprises a wall, and wherein installing the mount piece onto the magazine well of the lower receiver comprises installing the mount piece to the magazine well wall;
• h) wherein said mount piece comprises a plurality of portions securable to the magazine well wall;
• and
• i) wherein the rifle includes a trigger guard with a trigger guard space, and wherein at least one of said plurality of mount piece portions securable to the magazine well wall passes through the trigger guard space.