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Jan 07, 2026 - 10:07 AM
We’ve provided several answers to questions related to PolarStar MRS Regulator | Modular Regulator | w/o Line , see some other helpful Q&A related to this product.
Question: What size is the piston bore in the MRS regulator?
Answer: The MRS regulator features an oversized 4mm piston bore. A larger piston bore increases airflow and the refresh rate, which means the regulator can keep up with rapid firing and maintain consistent performance, even at lower pressures.
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