I got one of the new model TAC-14 "firearms"

What used to be known as the "Witness Protection" model.

Remington is making it again.

https://www.remarms.com/other-products/model-870-tac-14

I want to be able to swap between polymer and wood forearms without having to use the tool that looks like some sort of spark-plug socket to remove the polymer or wood hand-piece from the metal slidey-tube. Would be easier if I have TWO slidey-tubes with the hand-grip already installed.

So I'm gonna get an extra slidey-tube off eBay or Gunbroker or some such. I guess.

That way I can have a polymer or wood forend configuration ready to go as my mood or interest suits me.
And without having to screw around with that "spark plug socket" tool.



So, here is the QUESTION:

Does it matter which slidey-tube I use?

I'm looking at these two slidey tubes:

"Remington 870 Old Style Wingmaster 12ga Forend Tube"
https://www.ebay.com/itm/225517155648
versus
Remington 870 Police Magnum 12ga Forend tube"
https://www.ebay.com/itm/225525667349

Does the "magnum" nomenclature have any significance in this regard?

The barrel of the TAC-14 is marked to indicate that it will accept 3" shells.
So I assume the "MAGNUM" slidey tube would work with the TAC-14.

But just to throw a curve ball in the question, does anyone know if the MAGNUM slidey tube will work with an old 2.75"-ONLY Wingmaster?

At least in my mind, it would be nice to throw a beater forearm on my beloved sentimental-value 870 if I go out to play with it shooting pigeons or such in foul weather, and where the gun might be knocking around in a blind or behind the seat of the farm truck. Leave the shiny and nicely-checkered wood at home for the day.

Either should work on a Wingmaster. The receivers are the same, I had a 2 3/4 barrel long ago and had the chamber reamed for 3” shells and it worked fine.

Using needle nose pliers in the open position is an easy substitute for the forearm removal tool.

I use a flat piece of 1”x1/8” aluminum bar chucked into vise grips as a forend spanner. Just cut the bar length to the tube diameter.