Abstract: A method and apparatus are disclosed for substituting a different forend assembly in a long gun (e.g., a shotgun) without the use of tools by a user in the field. Applicants' preferred apparatus for substituting a forend comprises: a modified forend carrier that is affixed to the long gun (e.g., the illustrated shotgun); a forend; and tool-less means for removably attaching the forend onto the carrier, or removing the forend off the carrier, without the use of tools, wherein the tool-less means comprises: (i) a tongue-and-groove arrangement in the forend and carrier, and (ii) a releasable lock contained, at least in part, in the carrier. This permits the forend to be swapped out.

Abstract: A method and apparatus are disclosed for substituting a different forend assembly in a long gun (e.g., a shotgun) without the use of tools by a user in the field. Applicants' preferred apparatus for substituting a forend comprises: a modified forend carrier that is affixed to the long gun (e.g., the illustrated shotgun); a forend; and tool-less means for removably attaching the forend onto the carrier, or removing the forend off the carrier, without the use of tools, wherein the tool-less means comprises: (i) a tongue-and-groove arrangement in the forend and carrier, and (ii) a releasable lock contained, at least in part, in the carrier. This permits the forend to be swapped out.

Abstract: A method and apparatus are disclosed for substituting a different stock, or a different receiver assembly, in a long gun (e.g., a shotgun) without the use of tools by a user in the field. Applicants' preferred apparatus comprises: a long gun (e.g., an illustrated shotgun) having a stock and a receiver assembly; and an adaptor assembly which removably interconnects the stock to the receiver assembly, wherein the adaptor assembly includes: an adaptor base affixed to the receiver; an end of the stock is mounted onto the adaptor base; and a rotatable locking pin, continuously attached to the base, which can be lifted up and rotated or turned on its axis by 90° to unlock the adaptor assembly. The stock can then be pulled off the adaptor base. Upon a new stock being mounted on the adaptor base, the locking pin can be rotated back to its original orientation and pushed down to lock the adaptor assembly, whereupon the adaptor assembly interconnects the substitute stock with the receiver assembly.

Abstract: A method and apparatus are disclosed for substituting a different stock, or a different receiver assembly, in a long gun (e.g., a shotgun) without the use of tools by a user in the field. Applicants' preferred apparatus comprises: a long gun (e.g., an illustrated shotgun) having a stock and a receiver assembly; and an adaptor assembly which removably interconnects the stock to the receiver assembly, wherein the adaptor assembly includes: an adaptor base affixed to the receiver; an end of the stock is mounted onto the adaptor base; and a rotatable locking pin, continuously attached to the base, which can be lifted up and rotated or turned on its axis by 90° to unlock the adaptor assembly. The stock can then be pulled off the adaptor base. Upon a new stock being mounted on the adaptor base, the locking pin can be rotated back to its original orientation and pushed down to lock the adaptor assembly, whereupon the adaptor assembly interconnects the substitute stock with the receiver assembly.