US12504242 - Modular lower receiver

The patent describes a modular lower receiver made of polymer that features an interior with sockets for a grip attachment and a bolt catch assembly. It allows for the secure attachment of a grip through a threaded insert, enhancing customization and functionality.

Claim 1

1 . A lower receiver comprising: a polymer main body having an outer surface and defining an interior, wherein the interior of the polymer main body defines a first socket and a bolt catch assembly socket; a grip attachment body that is receivable, along a first axis, into the first socket of the interior of the polymer main body, wherein the grip attachment body comprises a first threaded insert that is configured to receive a fastener for securing a grip to the lower receiver; and a bolt catch assembly, the bolt catch assembly comprising a bolt catch housing that is receivable into the bolt catch assembly socket of the polymer main body. a polymer main body having an outer surface and defining an interior, wherein the interior of the polymer main body defines a first socket and a bolt catch assembly socket; a grip attachment body that is receivable, along a first axis, into the first socket of the interior of the polymer main body, wherein the grip attachment body comprises a first threaded insert that is configured to receive a fastener for securing a grip to the lower receiver; and a bolt catch assembly, the bolt catch assembly comprising a bolt catch housing that is receivable into the bolt catch assembly socket of the polymer main body.

Google Patents

https://patents.google.com/patent/US12504242

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12504242