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.
No known sn data.
What it is chambered for. Shoot as many different loads and pattern.
Shotgun by far
Side-by-side
That really depends on the condition. Take it to a gunsmith or appraiser or go to auctionarms.com to get an idea of what they are selling for.
Try www.gunbroker.com
Can't be answered without a detailed description of all markings, finish, barrel length, condition, accessories, box, papers, etc..
It is a dodecagon
A12 is oil change, tires rotation and Air and Pollen Filter Replacement.
If you have values in cells A1 through A12, you can add the column of values with the formula =SUM(A1:A12) .
25 miles taking this route:Take A127 LONDON, from Rayleigh, to A12.Take A12 to London.
a12