No, a Remington 870 barrel will not fit a Remington 887. The two shotguns have different designs and specifications, including differences in the action and barrel attachment methods. While they may share some similarities, their compatibility does not extend to barrel interchangeability. Always consult the manufacturer's guidelines for specific compatibility information.
Sorry, no answer from me, but I would like to know the answer to this question as well.
no
no but it will fit a mossburg 500
No there are ways, it invalves drilling holes to vent gas witch operates the gun.
No, a 12 gauge Remington 870 barrel will not fit a 12 gauge Remington 1100. The two shotguns have different designs and systems; the 870 is a pump-action shotgun, while the 1100 is a semi-automatic. Their barrel attachment mechanisms and receiver dimensions differ, making them incompatible with each other.
Without seeing it, almost certainly not.
NO
12gauge magazine cap fit on a 2ogauge 870 mag cap
No. The 11-87 has a recoil spring & tube in the stock, the 870 uses a single bolt.
You will need a good gunsmith. The information you seek is not readily available in published material.
No, the Remington Model 1100 stock has a hole (recepticle) through the inside of the stock in the pistol grip area to accept the action spring tube. The Remington Model 870 stock has no need for this hole so the 870 stock will not fit on the Model 1100 action.
Yes, The receiver pins are the same as the Remington 870, so any stock that will fit the 870 will fit the 7400