I just bought a Remington 870....It is used but in like new condition...The dealer who also a friend of mine told me that he had sold it originally to a local Police officer in I want to say he said the late 70's early 80's...He also said that it only been fired a very few times and I do believe it the bore, the wood and the bluing all look brand new...He saif theat the Officer stored it at his home for a HD weapon...it has about a 19 1/2 barrel that is marked 2 3/4 inch shells or shorter...it is stamped Wingmaster...the action is very tight and smooth(unlike my Mossberg 500 but this not to dis the Mossy...I really like it)...what is the best way to find the age of the piece??? I was told that it was an older model riot gun (not by the dealer) could this be true? also sometime loading shell in the mag the shells will get wedged in the of the tube like the tube diamenter was a little too small...any ideas on how to fix this...wold it be wrong to add an extended tube to a classic like this...what would be involved in add an extended tube would this be a gunsmith job...