Take the plug out of the mag. unscrew the cap, pop out the spring stopper with a screwdriver. remove the spring and plug. Put the spring back in without the plug.
From the factory, it will hold a total of 5: 4 in the magazine, plus 1 in the chamber. Remington includes an optional magazine plug that can be user-installed to limit the magazine capacity to 2 shells, in compliance with the Federal Migratory Bird Treaty Act (but I seriously doubt anyone actually installs this unless hunting on Federal land). Third-party magazine extensions are readily available that will increase the capacity of the magazine by at least 3 more shells. (Seriously, if you have to ask this question you probably shouldn't be allowed to own a gun.)
3 with plug 5 without
When hunting, most states will require that a shotgun not be able to hold more than 3 shells- the plug blocks the magazine to limit how many shells. When not hunting, the plug is not required. It IS required when hunting any migratory bird- such as ducks, geese or dove.
Most hold ammo in tube under the barrel. Make sure firearm is empty then unscrew the end cap on tube/magazine. Plug should be there.
I own a glenfield 778 without the magazine plug it can hold a maximum of 6 rounds on in the chamber and 5 in the magazine
You can request a owner's manual at the Remington web site.
That depends on the shotgun and whether it as a "sporting plug" installed. A plug will limit the gun to three in the magazine. Without the plug, the gun may hold a few more. General, no more than five or so however magazne extensions can push that to eight or more.
They are about 6" long.
Well, different types of shotguns can hold varying amounts of rounds or shells. For example a Side by Side, or an Over & Under barreled shotguns can hold two rounds. The "typical" or "average" shotgun can hold 6-8 rounds without a plug. For example the Remington 870 or the newer model the 887. A plug is used to limit the amount of rounds in order to shoot types of game, like waterfowl, in which hunters are only allowed 3 rounds loaded at one time (on certain lands). Some home defense models of shotguns hold 12-15 rounds, depending on the model of course. A popular high capacity model is the Saiga shotgun, holding 10-20 rounds depending on the magazine, having both semi-auto and full auto variants.
The J C Higgins Model 20 holds 6 rounds with out a magazine plug
Unscrew cap from end of plug chamber .Take your barrel off there will be a little tin cap at the end of your plug barrel take it out to get to your plug