US12385703 - Modifications for AR-10 style firearm

This patent describes modifications to an AR-10 style firearm that allow it to fire cartridges ranging from 73.66 mm to 91.44 mm in length while maintaining the overall dimensions and weight of a standard AR-10. Key modifications include changes to the upper and lower receivers, magazine well, and other components to accommodate the new cartridge specifications.

Claim 1

1. A firearm comprising: an upper receiver; a lower receiver coupled to the upper receiver, wherein the lower receiver comprises a magazine well, wherein the magazine well has a length of 101.7 mm+/−1.0 mm; a pivot pin arranged at a first end of the lower receiver; a takedown pin arranged at a second end of the lower receiver; a trigger guard coupled to a second end of the magazine well, wherein the trigger guard is arranged between the pivot pin and the takedown pin; a safety pin; and a bolt catch, wherein the position of the bolt catch is shifted to a position posterior to the magazine well; a barrel coupled to the upper receiver, wherein the barrel is configured to fire a cartridge having a length between 73.66 mm and 91.44 mm; a buttstock having a first end and a second end, wherein the first end of the buttstock is coupled to a second end of the barrel, and wherein the firearm is a rotating bolt firearm; and a magazine configured to be received in the magazine well, the magazine having a cavity configured to receive a cartridge having a length between 73.66 mm and 91.44 mm, and wherein the firearm has a length of a standard AR-10 of 958.85 mm (37.75 inches) with a 508 mm (20 inch) barrel, that extends from a first end of the barrel to the second end of the buttstock. an upper receiver; a lower receiver coupled to the upper receiver, wherein the lower receiver comprises a magazine well, wherein the magazine well has a length of 101.7 mm+/−1.0 mm; a pivot pin arranged at a first end of the lower receiver; a takedown pin arranged at a second end of the lower receiver; a trigger guard coupled to a second end of the magazine well, wherein the trigger guard is arranged between the pivot pin and the takedown pin; a safety pin; and a bolt catch, wherein the position of the bolt catch is shifted to a position posterior to the magazine well; a magazine well, wherein the magazine well has a length of 101.7 mm+/−1.0 mm; a pivot pin arranged at a first end of the lower receiver; a takedown pin arranged at a second end of the lower receiver; a trigger guard coupled to a second end of the magazine well, wherein the trigger guard is arranged between the pivot pin and the takedown pin; a safety pin; and a bolt catch, wherein the position of the bolt catch is shifted to a position posterior to the magazine well; a barrel coupled to the upper receiver, wherein the barrel is configured to fire a cartridge having a length between 73.66 mm and 91.44 mm; a buttstock having a first end and a second end, wherein the first end of the buttstock is coupled to a second end of the barrel, and wherein the firearm is a rotating bolt firearm; and a magazine configured to be received in the magazine well, the magazine having a cavity configured to receive a cartridge having a length between 73.66 mm and 91.44 mm, and wherein the firearm has a length of a standard AR-10 of 958.85 mm (37.75 inches) with a 508 mm (20 inch) barrel, that extends from a first end of the barrel to the second end of the buttstock.

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