4.5 inches.
Remove the cap from the end of the tube and be careful of the spring which is under pressure. The plug will come out with the cap.
NO
Remington does not show a 870 rifle on their web site. Do you mean the 870 Shotgun? the Remington 870 is one of the most popular shotguns in the us. this shotgun ranges from $300 for the basic model to $1000 for the fancy Wingmaster edition
No
Yes.
Serial numbers by year for the 870 Remington Model.
All Remington model 870 shotguns were made in the Unites states.The Remington plant was located in Ilion,New York.
The average price of a Remington 870 Express Magnum pump 12 gauge shotgun "brand new" is about 300-450 dollars. I got mine used for $250
To remove the plug on a Remington 870 series all you need to do is unscrew the cap on the end of the magazine tube. Carefully because it holds in the magazine spring. the plug is the rod that is inserted in the spring so it cannot compress fully to limit capacity so just take it out and screw the cap back on (the cap compresses the spring) and voila. takes about twenty seconds.
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.
The 870 Remington shotgun used to be a popular candidate for a "release" trigger.