Tuning RAW HM1000X .25 UPGRADATIONS PART 2 YOUTUBE VIDEO

How can I get one of your plenums? I have a RAW that I am converting to .20 and will shoot heavy slugs. I will need a plenum to maximize efficiency (looking for high shot count) however, due to smaller caliber, I do not think it will have to be very big. 

Thank you for your time,

Gene

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