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**Build to order**
Item may take approximately 10 ~ 15 business days to prepare and ship.
Extended Length & Strength spring for Daytona gun Airsoft system.
Increases ROF by increasing cycle speed.
All kits with reinforced airshaft will handle heavy recoil spring without problems.
*Requiring Higher PSI to Operate heavy recoil spring.
*Slightly lowers the feeling of recoil.
*Profesional tuning required, use at own risk.