The SIG MPX Bolt Ring is a genuine OEM replacement part designed to ensure proper gas sealing and smooth bolt carrier function within the MPX operating system. This precision-machined ring helps maintain consistent cycling, reliability, and overall system efficiency. Built from durable, heat-treated steel for long service life and resistance to wear, it’s an essential maintenance item for keeping your MPX running at peak performance. Ideal for replacing worn or damaged rings during routine service or rebuilds.
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