Close the action. Insert a wooden dowel all the way down the barrel. Mark the point where it leaves the barrel. Withdraw the dowel, measure from end to mark. Rifles must be at least 16 inches, shotgun must be at least 18 inches.
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it is in china, keep walking right and you will see a barrel of gun powder
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No, but you will lose your hand. See the Related Link.
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The 8 or 10 barrel Gatling gun was the early machine gun. See: http://en.wikipedia.org/wiki/Gatling_Gun
Go to the Chinese BC (That is at the bottom of the time traveller) just walk right and you will see a barrel. The barrel is the gun power.
The AR is an acronym for Air Restrictor in a Nerf gun. When you look down the barrel of a Nerf gun you see a little peg, this on of the Air restrictors. It varies with each gun.
trying to see who and where it was maked
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If "legal" means those reported stolen, then only law enforcement agencies have access. If your referring to characteristics of a gun, then the BATFE website may be of help.
I was given this same model shotgun and I have been trying to research the history. I have both the slug and bird barrel for this gun. I was at a gun show yesterday and I found someone had one for sale. The vender did not even know what gun it went to until I told him. So the best thing to do is to shop around gun shows, venders, and gun shops. As you see, if i had of called this guy; he would not have even known that he actually did have the barrel. Good luck