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US4437249A Conversion of modern shotguns into muzzleloading shotguns 失效
将现代霰弹枪转换成枪炮

Conversion of modern shotguns into muzzleloading shotguns
摘要:
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.
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