CowCow Supplemental O-ring for Blowback Housing

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  • Regular price $5.50
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The Details

  • 3 different sizes 9.5mm*2mm, 9mm*1.9mm & 9mm*2mm (inside diameter * cross section)black O-Ring for our B01 Dynamic Blowback Housing which can prefect fit to most common used nozzle on the market. These O-Ring is anti-oil and reduce the fiction during cycling.