Patent ID: 7287338

Claim:
A firearm measuring device, useable on a barrel of a firearm providing a plurality of measurement indicia contained within, for measuring all external dimensions of the firearm, the firearm measuring device comprising: an elongated rectangular caliper body member having two ends and measurement indicia inscribed thereon one side; a pair of jaws, said first jaw permanently affixed at one end of the caliper body member, said second jaw further attached to a carriage positioned on the caliper body member and slidable along the length of the caliper body member; a rectangular drop meter positioned adjacent to the fixed jaw, said drop meter having a channel within the length of the drop meter and a fastening means to the caliper body member for vertical upward and downward adjustment, said drop meter further having measurement indicia inscribed thereon; a rectangular extension member having a bottom edge consisting of a plurality of tooth-shaped configurations, said extension member having a means for attachment to the second end of the caliber body member and; a means for securing the rectangular extension member in combination with the caliper body member to the barrel of the firearm.