It depends on which one. The 870 comes in various configurations, some of which can be used for birds.
He used a Remington 870 Police Magnum.
no but it will fit a mossburg 500
50-500 USD or so
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.
No there are ways, it invalves drilling holes to vent gas witch operates the gun.
100-300 USD
Remington 870. Nine million plus
Remington 870 stocks can be purchased from a variety of places such as Cheaper Than Dirt, ATI Gun Stocks, eBay, Brownells, Midway USA, SCHEELS, and Bass Pro.
it could be any shotgun but my choice is my Remington 870, 20 gauge.
i paid 150 for an 870 express used in exelent shape 4 years ago, but that was a real good deal.
50-250 or so
i have a remington 870 wingmaster its my grandpas and it has 3 barrels the slug , the bird shot barrel and the muzzeloader barrel it takes a 209 primer just like the the regular muzzeloader its very interesting