It is called a Ramrod.
The ramrod
Take a cleaning rod with a non-rotating brush, push it into the muzzle about four inches and stop, mark a line on the cleaning rod with a magic marker right at the muzzle, put a tape flag at the end of the cleaning rod or at least 16" from muzzle, push down on the rod and watch the rotation of the flag, when it has made one revolution, stop pushing, put a mark on the rod at the muzzle, pull the rod out , measure from one mark to the other and you will have the rate of twist for your rifle.
A muzzle should never be used to try and "cure" aggression in dogs. That requires training.You should never use a muzzle to stop a dog from barking. How would you like having a muzzle put on you mid-way through a conversation?The muzzle flash gave away the sniper's position.
ramrod------it means forcing something
You are NOT supposed to put the ramrod back into the barrel if you want to fire the musket. It would go back in its slot.
The muzzle of the gun is the opening where the bullet comes out of the barrel of the gun. Looking at the muzzle is not someplace you want to be!A muzzle is a strap that you put on dogs, to keep them from barking or biting.
Over the mouth.
On its face.
Assuming the gun is a Weatherby Mark-V then probably. Weatherby's Accubrake is typically threaded on the gun, and it is not a bad idea to unscrew the muzzlebrake ever so often and clean the threads. However, it is not uncommon to use bonding agents such a locktite in place to keep the muzzle-brake from unscrewing itself under the force of recoil. Depending on the bonding agent use this can make un-screwing the muzzle brake range from difficult to pipe-dream. It is also important to note that muzzle-brakes do more than just reduce recoil. Once a gun has been threaded for a muzzle-brake, said brake also pulls double duty helping to protect the crown of the barrel and has an effect on the barrel's rigidity. If you remove your muzzle-brake you should probably put it back, or replace it with a thread protector before firing the gun. If you firearm is not a standard Mark-V Weatherby, or you cannot unscrew your muzzle-brake you should have a gunsmith take a look at the gun for you.
put a muzzle on it
If he/her is aggresive, then yes you should. Your dog could be put down for attacking somebody, so its better not to take any chances. But if your not sure if your pets aggresive towards people or other animals, than you should try wearing a muzzle once or twice, see how it goes.