Archer Airguns specializes in seal kits for many popular airguns, including the Benjamin Marauder, Armada and Discovery, Crosman Challenger, 1377, 2240, 397, Beeman QB78 and QB79. These kits comprise all the parts you need to reseal or repair your airgun, including seals, O rings, screws and other metal parts as required. Our 2X Seal Kits include two sets of the main seals and O rings. We know it's always easier to re-assemble an airgun the second time and tiny parts have a distressing tendency to roll away into inaccessible places no matter how hard you try. With Archer Airguns 2X Seal Kits, you're covered!