My dad got a Contender in trade for some work with a 13" 45-70 barrel and a Leupold pistol scope but it had no ports/brake. Awesome fireballs.
280 GNR Encore pistol, think 7mm RM in a rimmed cartridge. At arms length the 17" ported barrel that'll blow your hat and muffs off every time you pull the trigger. I traded it off for a different barrel but the guy I traded it to used it as a carbine.