Classic Army Polymer M4 AEG with 12" MLOK RailFeatures Flip up front and rear iron sights Integrated adapter sling mount Retractable 6 position crane stock High density polymer upper and lower receivers for durability Full metal Version 2 gearbox w 9mm bearing bushings ECS system allows you to shoot in 3 to 5 round burst ECS system also has motor protection and low battery detection feature Built in MOSFET improves durability and delivers snappy trigger response Rail segments assist in mounting
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