Jun 24, 2025

US12339084 - Firearm platform and method of connecting upper and lower receivers

A firearm platform and method of connecting an upper receiver to a lower receiver. The upper receiver has a pivot lug and a takedown lug with perimeter openings in opposite directions. The lower receiver has a locking member that pushes against the takedown lug which causes the upper receiver to displace forward. As a result of the forward displacement, a pivot pin in the lower receiver exerts an opposing force against the pivot lug. The locking member is displaced between a locked and unlocked position through a lever located on an exterior surface of the lower receiver. When the locking member is in the locked position, the lower receiver and uppers receiver form a connection that is tight and free from slop.

Inventors: Keith Berry
Filing date: 2023-01-17

firearmreceivermechanism

The patent describes a firearm platform that features a unique method for connecting an upper receiver to a lower receiver, utilizing a pivot lug and a takedown lug with opposing perimeter openings. This design allows for a secure and slop-free connection when the locking member is engaged, enhancing the firearm’s stability and functionality.

Claim 1

A firearm platform comprising: an upper receiver having a barrel end and a buttstock end opposite said barrel end, a pivot lug with a first perimeter opening facing a first direction, and a takedown lug with a second perimeter opening facing a second direction, said first direction being substantially opposite said second direction; a lower receiver having pivot pin and a locking member; wherein the pivot pin enters into the first perimeter opening and the locking member enters into the second perimeter opening; and wherein the first direction is toward the barrel end and the second direction is toward the buttstock end.

Google Patents

https://patents.google.com/patent/US12339084

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12339084