Variable Mass Piston for SRS A1/A2

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SRS Variable Mass Piston - NBR piston cup- CNC AL 6061 T6 piston head- CNC AL 6061 T6 piston body- CNC steel piston end- CNC aluminum weights (4 pieces)- CNC steel weights (4 piece s)- PTFE grease- Tools This specialized piston allows you to adjust your SRS’s output energy by tuning the piston mass from 40 to 137 grams across 15 different configurations. Please follow the tutorial video below: Ref: SBA-BPS-18 Show more