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X-RING seal for piston head (XRTP) The X shape has less friction and traps lubricant better. According to FPS, X-rings are best used for semi-auto DMR rifles and for slow ROF under 20 bbs/second. The X-RING can be used for ~30 bbs/second, but the power of the replica should not exceed more than 1 joule for high rates of fire. If the rate of fire is high AND the power output is high, consider a regular Viton O-ring. 100% MADE IN ITALY
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🇺🇸 Ship from USA · On Agora since 2025
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