My son-in-law showed me this H&R with a case hardened finish receiver , with a scope on it with a sleeve on the stock with 44 mag rounds in it. Upon further inspection, the barrel had "Topper 44 Remington Magnum" on it, the serial started with BB. Now I'm confused. I cannot find any reference to this firearm. I did not look to see if SB1 or SB2 receiver tho. Any help?