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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16
For Marui MWS GBB series
equipped with a thrust bearing
DEVGRU Custom HK416D and Delta Custom HK416
One-piece design with no loose parts
Digital zoom in thermal channel
Variable Mass Piston for SRS A1/A2 SP-3DPRINT- Saiga 12k Zenitco Handguard - PETG For Marui MWS GBB seriesSRS 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 pieces) PTFE grease Tools This specialized piston allows you to adjust your SRSs 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
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