What size is the piston bore in the MRS regulator?
PolarStar MRS Regulator | Modular Regulator | w/o Line
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Open Jan 07, 2026 - 10:19 AM
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Answer
Jan 07, 2026 - 10:19 AM
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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PolarStar MRS Regulator | Modular Regulator | w/o Line
The PolarStar Airsoft Modular Regulator System (MRS) is an ultra compact regulator that stands 3 inches tall and utilizes built in threads to connect to your HPA tank. Simply screw in your tank and go! This eliminates the need for an external UFA, which saves a ton of space and allows this reg...
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