i believe it is the breech <><><> The breech is the opening at the rear of the barrel. The opening at the front is the muzzle.
Known as the muzzle
It is the opening at the front of the gun where the bullet leaves the barrel.
The long piece is called the barrel. It's also considered dangerous. The opening is referred to as the bore.
The muzzle. Usually incorporates the crown and bore. It is where the term "muzzle flash" comes from
This BB rifle is made by Daisy. The number will be on the barrel in front of the rear sight.
Rifles and pistols
Guns backfire when there is something blocking the hole in thee end of the barrel
Barrel Blocking Device
The first guns were cannon- they were rather short, and looked like a barrel- a hollow container, round and long.
Try the barrel, action, breech
A barrel, but that is about it.