So I bought a Remington 870 Tactical about two weeks ago, had a Mesa Tactical shell carrier mounted on it as well as a Blackhawk Knoxx stock. Been working alot and me and another deputy I work with finally got around to checking it out, first thing is the tube only held 5 shells, not 7, took the tube off, checked to make sure there was no plug, put tube back on, now it holds 6 and almost 7 (about 1/4" of 7th shell will not go in), so going to take tube off again to make sure spring is seated in follower, everything is lined up, etc etc. New problem, my front sight fell off, looks like there is supposed a detent pin or something between the sight base and the actual sight itself, anyone know anything about this? any help is greatly appreciated