The Springer Precision extra power magazine spring for the 2022 THRiL designed MPX magazines. This design is also for the new style OEM magazines for the MPX from Sig Sauer. These springs work as an extra power replacement with the factory base pad configuration and our +5 Mag Extensions we offer.

+5 Mag Extensions for Sig Sauer MPX THRil Mags

New THRiL MPX Magzines