You will have to be more specific.
Mikhail Kalashnikov.
My father gave me a rifle for Christmas. I fired my rifle for the first time. My rifle misfired.
He called it Tick Licker. Claimed he could shoot a tick off an animal's back without harming the animal.
The name of the sniper rifle in Brothers in Arms is the Springfield 1903A4 bolt-action rifle.
A bayonet is the name of a knife attached to the barrel of a rifle.
It would help if you gave the model number.
So far as we know, he did not name his FIRST rifle (it was traded for land) but you may be thinking of his favorite rifle his "Beautiful Betsy" or "Betsy".
Henry rifle.
When Daniel Boone was twelve his father gave him a rifle
Between $10 and $1000. Value of a rifle depends on make, model, and CONDITION. You gave us none of the three.
The knife attached to a rifle (Not Riffle) is called a "Bayonet".
Thuppaakki