What do you all think about this subject? We all know that you should have a system of firearms for this type of situation but, do you think a carbine and a pistol are your best options? Maybe a carbine and a shotgun, maybe a shotgun and a pistol? Maybe some other combo? What are your thoughts? My choice would be the HK 45 pistol and the HK USC/UMP 45 carbine. Why? Well, they are both pretty reliable firearms and they utilize the same caliber of ammo. I personally feel that packing two different calibers would be slightly cumbersome and possible confusing when looking to reload. IMO, I would certainly sacrifice some distance range of something like an AR for matching caliber guns. The USC/UMP carbines sport enough accuracy to handle some distance; probably like 200 yards if your a good shot. They also have the knock down power of the .45 ACP behind them for close quarters work.