US12760990 - Shotgun hollow buttstock adapter

The shotgun hollow buttstock adapter allows for the secure attachment of recoil pads to hollow shotgun stocks, enhancing user comfort and recoil management. Its design includes a chamfered plate that facilitates easy insertion and rotation within the stock, minimizing deformation during installation.
Claim 1
1 . An adapter system, the adapter system comprising: a firearm having a hollow stock, an end of the hollow stock having a lip and a stock height and stock width, the stock height and the stock width measured within the end of the hollow stock next to the lip; a plate, the plate having an outer edge, front face, and a back face, the front face having a plate height that is substantially equal to the stock height and a plate width that is substantially equal to the stock width; a chamfer along an entire junction between the back face and the outer edge, creating a chamfered edge; the plate held within the firearm hollow stock by the lip of the firearm hollow stock engaged with the outer edge of the plate; two mounting holes through the plate, each mounting hole of the two mounting holes is threaded to affix a recoil absorption device to the hollow stock; a central circular hole for accepting a feature of the recoil absorption device; and wherein the chamfered edge is configured for insertion of the plate into the hollow stock and then to be rotated into place within the hollow stock with less deformation of the firearm hollow stock than if the plate lacked the chamfer. a firearm having a hollow stock, an end of the hollow stock having a lip and a stock height and stock width, the stock height and the stock width measured within the end of the hollow stock next to the lip; a plate, the plate having an outer edge, front face, and a back face, the front face having a plate height that is substantially equal to the stock height and a plate width that is substantially equal to the stock width; a chamfer along an entire junction between the back face and the outer edge, creating a chamfered edge; the plate held within the firearm hollow stock by the lip of the firearm hollow stock engaged with the outer edge of the plate; a chamfer along an entire junction between the back face and the outer edge, creating a chamfered edge; the plate held within the firearm hollow stock by the lip of the firearm hollow stock engaged with the outer edge of the plate; two mounting holes through the plate, each mounting hole of the two mounting holes is threaded to affix a recoil absorption device to the hollow stock; a central circular hole for accepting a feature of the recoil absorption device; and wherein the chamfered edge is configured for insertion of the plate into the hollow stock and then to be rotated into place within the hollow stock with less deformation of the firearm hollow stock than if the plate lacked the chamfer.
Google Patents
https://patents.google.com/patent/US12760990
USPTO PDF
https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12760990