I'm trying to decide between these two Mossberg combos:

The Field/Deer combo with a 28" smooth barrel and 24" rifled barrel with integrated scope: https://www.mossberg.com/500-combo-f...eer-58244.html

The Field/Security combo with a 28" and 18.5" smooth barrels: https://www.mossberg.com/500-combo-f...ity-54169.html


What I want is a gun that I can use for home defense and also to hunt pretty much anything if/when the SHTF (no plans for recreational hunting currently, but I want to be prepared for anything). Pricing is about the same for both, but if I bought the first combo I would also buy an 18.5" barrel separately because I think that's important for the HD part. I'm just not sure if the rifled barrel with the integrated scope is really needed - I know I can shoot slugs out of a smooth bore, so aside from the integrated scope, does the rifled barrel really get me any capability I wouldn't already have? The scope seems like a nice idea, but then I'd also have to spend another $150-200 for the short barrel, which I would already have if I just went with the other combo.

So help me decide:

Three barrels, 18.5", 28", 24" rifled w/scope: $700, or
Two barrels, 18.5", 28": $550 (and spend the extra $150 on ammo)

Or stated simply: When the SHTF, would I rather have a rifled barrel with a scope, or an extra $150 worth of ammo?