hey guys im building my own mag and i want an ult on my valve so i won't have a heavy pull.
i want an x valve but either can't find one or can't fine one for cheap.
i was wondering will the ult work with an retro valve or emag valve?? i know it won't work on an classic vlave
thanx!
i want an x valve but either can't find one or can't fine one for cheap.
i was wondering will the ult work with an retro valve or emag valve?? i know it won't work on an classic vlave
thanx!

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