Judged against previous gas semiautos, the 1100 was vastly more reliable. Today it doesn't compare with Brownings, Berettas, and Benellis but if you keep it clean, it will not fail you in the field. It may break down in competition and most serious 1100 target shooters--if there are any left--carry spare parts and can put their guns back in action in minutes. A friend who hunted hard with 1100s and 11-87s for years always took his gun apart and ran the gas system parts through the dishwasher every time he shot them. He never had a problem with his gun. Incidentally, Remington's Jay Bunting told me it's a mistake to replace the factory O-ring with a thicker, more durable ring. All that does, he says, is potentially keep the gun from closing completely, leaving it out of battery.