US12710241 - Firearm receiver assemblies

The patent describes a firearm receiver assembly featuring a receiver body with multiple cavities and corresponding rails, each equipped with retaining features. These retaining features include protrusions that engage the interior of the cavities to secure the rails in place.
Claim 1
1 . A firearm receiver assembly comprising: a receiver body comprising a plurality of cavities; and a plurality of rails, wherein: each of the plurality of rails is disposed in one of the plurality of cavities; each of the plurality of rails comprises at least one retaining feature; and the at least one retaining feature comprises a protrusion that penetrates an interior portion of the corresponding cavity. a receiver body comprising a plurality of cavities; and a plurality of rails, wherein: each of the plurality of rails is disposed in one of the plurality of cavities; each of the plurality of rails comprises at least one retaining feature; and the at least one retaining feature comprises a protrusion that penetrates an interior portion of the corresponding cavity.
Google Patents
https://patents.google.com/patent/US12710241
USPTO PDF
https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12710241