The 12 gauge double barrel Remington is S-Mart's top of the line. You'll find it in the sporting goods department. They're made in Grand Rapids, Michigan, and retail for about $109.95 - Walnut stock, cobalt blue steel, and a hair trigger. Shop smart - Shop S-mart. Nehehehe...
Find an authorized Remington Repair center. You can find a list on Remington's web site.
Almost every gun shop worth its salt should have a slug barrel for the remington model 870,if not then they should be able to order one with no problem.
I have a 16 gauge double barrel for sale.
Go to Dunhams... They have everything.
Caliber is .243, buy ammo in .243.
Where can I buy a forend grip for a wm Parkhurst double barrel 12 gauge
You might find one at Numrich Gunparts
Check with Remington thru customer service at their website, and see who is a distributor in your area.
Browning did not offer one, but you may find an aftermarket Hastings barrel (www.hastingsbarrels.com) that will do the trick.
Try e-gunparts.com
the most u will get is $5. ill buy it from you for $10