Best left to a trained gunsmith.
Shotgun barrel that has a raised rail (rib) that runs the length of it. Here is an auction site with pictures of a shotgun with vent rib barrel. http://www.gunbroker.com/Auction/ViewItem.asp?Item=80157268 on a firearm it is a raised bar above the barrell
It's a Stevens 620.
60-260 usd
collects dirt, may come off
The vent rib breaks up the heat waves that rise from a hot barrel which interfere with sighting.
The current value of an ithica gauge over under with vented rib barrel and auto injectors is $1200.
That would depend on the type of barrel with the shotgun(plain,matte solid rib,or vent rib barrel)if a poly choke is present on the end of the barrel,and what condition the shotgun is in.
The Winchester model 1894 rifle was never made with a vent rib barrel! the only Winchester made firearms with a vent rib barrel was Winchester shotguns.
Your question can't be answered as written. What Model? What are ALL the markings? What gauge? How long is the barrel? What type of finish? Mossberg 500C, 20 gauge, 26" accu-choke, serial number K064007, checkered wood stock, blued barrel, vented rib barrel.
Is it a sportsmaster .22?? If it is i can tell you.
solder
A rib is a raised strip of metal that runs the length of the top of the barrel. A ventilated rib is not solid, but has slots beneath the solid strip.