Just got a handi from Wal-mart in 270. I went to the web site on barrels at HR1871 and the site indicates only receivers that have a ser.# begining in N or A I believe can have another barrel fitted from the company. My ser # begins CBA #####. Anyone out there know if the A in the first 3 digits is what they are talking about? I want a 223 ultra barrel for coyotes and the 270 is for the hogs in my area. I had two 223 handis but a friend wanted both of them for his kids and he made an offer I could not refuse but now I regret selling em. I picked this 270 up with scope new at Wally World for $297.00