E&C M16A4 AEG Airsoft Rifle EC-307QD System: With Quick Disassemble System, even beginners can replace the spring in a minimum of 60 seconds. Solid Construction: Built with a full metal upper and lower receiver for enhanced durability and authenticity. Easy Adjustment: Features a mock bolt that locks open, providing easy access for hop up adjustments. Upgradeable Design: Equipped with a metal Version 2. 0 gearbox, our airsoft gun offers easy upgradeability to enhance your gaming

Adjustable Barrel Length 10 inch Barrel Thread CCW Dimension     L×W×H 83 × 11 × 38 cm Gross Weight 3

Adjustable Barrel Length 11  inch Barrel Thread CCW Dimension    L×W×H 85 × 11 × 38 cm Gross Weight 4

5 inch Barrel Thread CCW Dimension     L×W×H 79 × 11 × 37 cm Gross Weight 4

Brand E&C  Airsoft Model EC-867 Firearm Model NOVESKE N4 Material Metal Power Source Electric Speed

Brand E&C  Airsoft Model EC-645

6 mm BB Hop Up

Adjustable Barrel Length 7 inch Barrel Thread CCW Dimension    L×W×H 64

Applicable to most E&C HK417 model AEG products

Authentic Design: Dive into action with a 1:1 replica of the SIG SAUER MCX

Brand E&C  Airsoft Model EC-106

Brand E&C  Airsoft Model EC-325 Firearm Model XM177E2 Material Metal Power Source Electric Speed

Brand E&C  Airsoft Model EC-337 Firearm Model SII Material Metal Power Source Electric Speed