870 Express Combo - 12 gauge barrel and 20 guage barrel?

[maxman1]

I'm just a bit confused as to how using a 20 gauge barrel on a 12 guage pump shotgun would work, unless it's a typo.

 

[none]

The " refers to inches not gauge as a 20" barrel = 20 inch barrel.

Remington 870 Express 12ga 3", 26" Vent Rib & 20" Rifled Barrels


Specifications: ActionPumpGauge12Barrel LengthCombo 26" VR & 20" RifledCapacity4 + 1Chamber3"Length46.5" VR & 40.5"...

 

[maxman1]

I was referring to this:

870 Express combo includes all of the popular features of the current model 870 Express, with the added versatility of a 12ga 20" fully rifled deer barrel and 20ga 26" vent rib all purpose barrel, with a Rem-Choke modified tube.

I'm wondering if he means a 20 gauge 20 inch rifled barrel or if it is a 12 gauge barrel and a 20 gauge barrel on the gun, and if so how 20 gauge shells would actually cycle in a 12 gauge magazine.

 

[none]

That would be a typo as 20 gauge cases are going to feed from the tube magazine all at once rather than one at a time and jam.The receiver is also smaller in size on the 20 gauge 870 as well.

Looked at this ad closer and it is a 20 gauge 870 so there's no way i can see to run 12 gauge shells .