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US 4,437,249 AGranted
Conversion of modern shotguns into muzzleloading shotguns
OwnerJames R. Brown, Karlis A. Sironsinventors
Life of this patent
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Abstract
A steel plug is inserted into a modern shotgun to convert it into a muzzleloading firearm. The plug is made for use as a breech plug in a single barrel shotgun without modifications to gun. The plug enables the shotgun to be used as a muzzle-loader with black powder and allows conversion of the gun back to its original condition by simply removing the breech plug.
Claims1
A conversion plug for removable insertion into a standard, unmodified shotgun having a conventional chamber and barrel for converting the shotgun into a muzzleloading firearm, said plug comprising:
- a cylindrical rear portion conforming to the shape of the shotgun chamber and having a tapered rear shoulder for engaging a cartridge rim receiving portion of the chamber;
- a reduced diameter forward portion extending forwardly from the plug rear portion into close fitting engagement with the bore of the shotgun barrel;
- said plug forward portion having a main bore with an outward flare at the front end thereof for receiving black powder when the firearm is loaded as a muzzleloader;
- said plug rear portion having a tapered bore therein for receiving a primer and a passageway connecting said primer bore with the main bore in said plug forward portion;
- said tapered rear shoulder of said plug rear portion having a circumferential cut-out therein allowing an ejector mechanism of said shotgun to bypass said plug, thereby avoiding ejection of said plug by the ejector mechanism;
- said plug rear portion having a circumferentially oriented groove therein and an annular sealing means in said groove;
- and said plug rear portion having a tapered slot in the rear end thereof intersecting said primer bore for aiding in the removal of a primer positioned in said primer bore.
4 more elements
Dependencies are inferred from the claim text.