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Air Efficient Eko™ Valve System (Patent #8
The system is secured with four anti-reversal latches
ELASTIC FINGER LOOP Is an optional way to secure the slider glove
Thumbtrac fans
Adjustable elastic and Velcro™ straps provide you a custom and secure fit for all day play
SIG Sauer ProForce Sportline MPX-K Airsoft AEG SMG - Custom Version Airsoft Batteries Air Efficient Eko™ Valve SystemFeatures This Custom Upgraded Version includes a reinforced CNC steel 18: 1 gear set and a fully reinforced steel tooth piston these parts are installed for longevity and enhanced performance Fully licensed SIG Sauer MPX K replica with complete SIG Sauer trademarks Strong Lightweight polymer construction with full metal gearbox with 7mm bearings Adjustable hop up accessible under the dust cover Full length top 1913 picatinny RIS for mounting optics,