It's a SB2 reciever and H&R will fit any barrel to it with the exception of the 10 gauge an 12 guage Ultra Slugger. I have a short .280 barrel now and if it is the long barrel I am interested in buying it from you, depending of course on how much you wanted for it, so, if you buy the gun what do you want for the barrel?.....Anything else you need to know ask, perhaps we can answer it for you....<><.... :grin: