much like a small two cycle engine. it is a split ring but when in the gun the gap is very small. That small gap has a hard time blowing by any air because it is compressed so fast. I had a 300.
These are low powered guns. not sure how a system like this would work in a gun like a tx or R9 like you have. I think it takes a very precisely honed tube for a steel ring to work and it just am y not be suited to high power.
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