i would need the gauge of the gun and the barrel length and if it is a plain barrel or ribbed barrel also if there appears to be any alterations done to it .
500.00
A barrel with a full choke.
This project should be probable.I would have a competent gunsmith give you a quote for threading the barrel to except the Invector plus choke system.
If you see spiral grooves when looking down the barrel, then it is rifled.
Your shotgun was made inÊ1965. In 95% condition it could be worth $1500, more if it has a ribbed barrel and open choke.
I have a mercury 12 gauge magnum 3 inch chamber full& full choke`s made in liege -belgium.with ducks in grave and other in grave.
If you mean a choke bored barrel, it designates the amount of constriction a shotgun barrel has.
At the end of the barrel
choke of sears model 20 12 gage plain barrel shotgun has 3 stars on barrel
I bought a 1400 mk 2 non ribbed 12 ga. yesterday for $165.00 US
Between 500 to 700 dollars depending on condition and location