Jan 27, 2026

US12535281 - Polymer firearm receiver

A receiver blank includes a receiver body with a magazine well and an insert. The insert is located internal to the receiver body, and the insert is manufactured before the receiver body. The insert must be removed from the receiver body to convert the receiver blank to a firearm receiver.

Inventors: James Matthew Underwood, Larry Cullen Underwood
Filing date: 2024-10-11

firearmreceiverpolymer

The patent describes a polymer firearm receiver blank that includes a magazine well and a removable insert made of water-soluble material, which must be taken out to convert the blank into a functional firearm receiver. This innovative design allows for easier manufacturing and potentially simplifies the conversion process.

Claim 1

1 . A receiver blank comprising: a receiver body comprising a magazine well; and an insert, wherein: the insert must be removed from the receiver body to convert the receiver blank to a firearm receiver; and the insert comprises a water-soluble material. a receiver body comprising a magazine well; and an insert, wherein: the insert must be removed from the receiver body to convert the receiver blank to a firearm receiver; and the insert comprises a water-soluble material.

Google Patents

https://patents.google.com/patent/US12535281

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12535281