O-Rings are an important part of maintaining a good Air Seal, especially when it comes to Gas Replicas which are handling a lot of pressure. When Seals become dry or cracked from neglect or just old age they stop being effective at their job - having some backup O-Rings is a great way to make sure that you're never disappointed the day before a skirmish. Alternatively, avoid having to replace O-Rings/Seal by keeping them well lubricated, and by keeping Gas (not CO2) inside magazines to assist with lubrication.
Airsoft Electric Parts - O-Ring
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