The ports can and will clog up over time with carbon and plastic wad fouling.
Depending upon the type of barrel, there may be one or more ports, and these ports can vary in size. A damaged "O" ring will allow gas to leak out of the system and make it more difficult for the gun to operate properly.įor the gas to get to the piston and piston seal, it has to pass through a vent or port in the barrel. Many folks are not as careful installing the "O" ring as they should be, and they inadvertently damage it. The "O" ring is often stretched, mashed, or damaged in some way. If the slots are aligned, gas will leak from the system and cut into its efficiency. If the slot in the piston seal is positioned at, say, 9 o'clock, then the slot of the piston should be at 3 o'clock. A trick I learned years ago is to make sure the slots in the piston and piston seal are not aligned. Reversal of the piston or piston seal will cause major problems and lead to malfunctions. The barrel is then slid on the tube, completing the assembly of the gas-cylinder components. Finally the "O" ring is placed on the magazine tube and pushed rearward until it's seated in a circular groove in the magazine tube. When installed, the taper on the gas piston matches and fits into the taper on the piston seal. The gas piston has a taper on one side and a reduced diameter step on the other. It's installed over the magazine tube with the flat side against the front face of the action-bar sleeve. The gas-piston seal has one flat side, a groove in the center, and a bevel or taper on the other side. The one I've seen most often is the incorrect assembly of the gas-piston seal, the gas piston, and the "O" ring or barrel seal. Many of the problems I've seen with the 1100 were caused by the gun owner. Once it reaches the end of its movement, the compressed action spring pushes the breech bolt forward, chambering the next round. The breech bolt continues back into the receiver, compressing the action spring. It then activates the carrier, raising the unfired shotshell so it can be loaded into the chamber.
As the breech bolt moves to the rear, it automatically extracts the fired shotshell and releases another shotshell from the magazine into the carrier.
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