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Extreme Durability Upgrade Level 1 (*330 fps)



  • Systema m100 Spring
  • Systema Metal Bushings
  • Systema Standard Ratio Flat Gears
  • Professional Installation

*fps is based on an average, firing .20 bb's.  Your actual performance will vary depending factors like inner barrel quality, length, bb weight and other factors. 

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  • Part #: AEGDUR1330
  • Manufactured by: AEX

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