I am torn between undertaking a "Tactical" Remington 1100 project or just purchasing a Mossberg 500.
This is a 1963 model Remington 1100 12ga that I was given, it had some SERIOUS external rust issues. After a bunch of steel wool and oil it came out usable and the internals are perfect. I can get a 18.5'' barrel for $180, a youth stock set for ~$60, and a cerakote job for $110 (includes the receiver and long barrel). I would eventually add the feed gate/latch mod thing and a +2 extension. I would probably end up with around $450 in this and I would have a great skeet/hunting shotgun also.
Or I want this:
My local FFL has this in stock for $430. I REALLY like the magpul stock and the ability to be able to run whatever loads I want (aka cheap crap).
I like the idea of having a semi auto "tactical" shotgun but worry it may be finicky with certain ammo and loading the 1100 is kind of odd. The Mossberg would be much easier to load (training issue?)
If I decide not to tac out the Remington I am still going to cerakote it and make it my hunting shotgun instead of buying a second barrel for the Mossberg.
::edit::
I should also note that the mossberg having a threaded receiver is kind of nice...