Carlsons Gas O-ring Assortment - Kit 12ga/20ga/28ga

The Carlsons Gas O-ring Assortment Kit 12ga/20ga/28ga is an essential maintenance component for semi-automatic shotgun owners and professional operators who rely on gas-operated action systems. This multi-gauge assortment addresses a critical wear point in popular shotgun platforms including Remington 1100, 11-87, Pro Bore, G-3 models, Beretta, Winchester, and Franchi shotguns. Gas o-rings are consumable items that degrade under sustained firing cycles, making regular replacement necessary to maintain reliable function and prevent gas system failures in the field.

Each o-ring in this assortment features graphite coating, a proven surface treatment that extends service life by reducing friction and wear during the gas piston's reciprocating motion inside the action tube. Graphite-coated rings maintain superior seal integrity across temperature extremes and resist gumming from gun oil residue and carbon fouling—common issues that compromise stock rubber o-rings. The kit's multi-gauge design eliminates guesswork when servicing different shotgun platforms, delivering the correct diameter rings for 12-gauge, 20-gauge, and 28-gauge systems in a compact, organized package.

This assortment is indispensable for armorers, law enforcement range masters, competitive shooters, and hunters who operate multiple shotgun platforms or cycle hundreds of rounds through their systems annually. Installation requires no special tools—simply remove the gas piston assembly, replace the worn o-ring with the correct gauge from the kit, and reassemble. Keeping these spare rings on hand ensures you can perform immediate repairs in the field or shop without shipping guns for service, reducing downtime during critical training or operational periods.