If you mean a choke bored barrel, it designates the amount of constriction a shotgun barrel has.
A barrel with a full choke.
They probably denote what choke the barrel has.
A shotgun barrel with a cylinder bore choke.
They came in various barrel lengths and choke combinations. If it is not marked on the side of the barrel, you will have to pattern the shotgun to determine the choke
The Choke of a shotgun is the amount of barrel restriction at the muzzle end which affects the shot pattern. A full choke will keep the spray pattern of the pellets closer together farther out than if the barrel was not restricted at the muzzle. If there is no restriction at the muzzle, the choke is said to be cylinder choke or cylinder bore.
It is called "choke". lcj
Choke.
No. A choke tube slips into and screws to the muzzle end of the barrel. It can only decrease the inside diameter.
choke of sears model 20 12 gage plain barrel shotgun has 3 stars on barrel
Either a full choke,or extra full choke shotgun barrel.
Best guess: You have a shotgun manufactured in Croatia. "Pun" means "Full" in Croatian. "Pola" means "Half". You would have something like 70% constriction in the Pun barrel and 55 to 60% constriction in the Pola barrel.