Abstract: A firearm maintenance aid can include a firearm vise and a firearm support device. Firearm vise can include vise jaws, a threaded rod connecting vise jaws together, and jaw pin holes in each jaw, the holes extending from an outer surface of a jaw through to an inner surface of each jaw, wherein the holes in the first jaw align with the holes in the second jaw. Firearm support device can include a clamping portion and a supporting portion. The clamping portion can be clamped between the jaws of the firearm vise, can include two parallel clamping faces, and can define vise pin holes that align with the jaw pin holes. The supporting portion can be located opposite the clamping portion and can include a cylindrical shaft. Vise pins can be received by the jaw pin holes and vise pin holes to fixedly connect the support device to the vise.

Abstract: An accessory for a working device can include a plug body, an extension portion, and a tool. The plug body can have a length along a first axis and can be comprised of a keyed connection piece on a first end. The extension portion can connect on one end to a second end of the plug body and on an opposite end to the tool. The plug body can be receivable by a plug receptacle on a receiving adapter or a working device. The accessory can further include a spring-loaded locking mechanism that can be structured and configured to transiently lock the plug body to a receiving adapter or a working device.