870 Wingmaster Info

[Keepkool]

I recently came across a 870 Wingmaster with 28" barrel . It also has a 18" slug barrel with a rifled choke. when changing barrel I found barrel is completely different . I believe the short barrel may be for a 1100 or and 1187. My question is will all 870 barrels fit 870 actions or are there different receivers to barrel combos.
Thanks in advance
Kevin

[ChillyB]

Barrels for 870 2-3/4 and 3 guns fit any 870 receiver. No idea about the 3-1/2.