So yesterday was the opener of duck season... Was using a 870. shooting Kent steel 3" #2's. Call in our first set of ducks, first shot goes off, go for my second follow up, and I look and my gun has something hanging off the side... I pull it down to examine it and the end blew up on me.... Im assuming it was too much pressure, or a faulty choke? If you look at the pictures attached its split mid thread on the choke (Modified choke). The barrel was clear of debris, and I checked because I put my 3 round plug in, in the field when we got to the blind. So not too sure? Not sure if Remington will do anything to fix or replace the barrel? does anyone know? History on the gun, its about 3-4 years old, Purchased in 09. have approx 1000 rounds through it. Clean it after every shoot.