Patent ID: 8683728

Claim:
A device for converting a firearm capable of fully chambering a live round to a firearm only allowing a blank to be fully chambered, the blank having a length less than a length of the live round, the firearm including a muzzle, a barrel, and a bullet chamber, the device comprising: a rod sized and shaped to occupy a central portion of the muzzle and a central portion of the barrel when the device is installed in the firearm; a tip disposed at a first end of the rod, the rod configured to position the tip within the barrel at a distance from the bullet chamber, the distance selected to allow a blank loaded into the firearm to fully chamber without contacting the tip, the distance further selected to place the tip in contact with a live round as the live round begins to be loaded into the bullet chamber, thereby preventing the live round from fully chambering; a muzzle block disposed at a second end of the rod and configured for attachment to the muzzle of the firearm, the muzzle block further configured to prevent a portion of exploding gasses emanating from a fired blank from escaping the barrel, the tip comprising a cone-shaped head and a plurality of vents configured to allow a portion of the exploding gases to travel unimpeded to the muzzle block.