GHK Daniel Defense Licensed MK18 M4A1 RIS II Airsoft CNC Aluminum RIS Dark Earth 40 mm closed bolt system so you hpa m4 adapter FPS Range 370 400 Style:Blue/White NINJAPK68D

closed bolt system so you are able to adjust the poppet valve (firing air) and nozzle (feeding) independently for full control over both the loading time and air volume used

The short post version will fit most customers

Pressure Range 60 do 140 PSI

Dimensions: 210mm x 130mmInner Barrel: 125mmMuzzle Velocity: 260~280 FPS (Measured w/ 0

50mm to 38

GHK Daniel Defense Licensed MK18 M4A1 RIS II Airsoft CNC Aluminum RIS Dark Earth 40 mm closed bolt system so you hpa m4 adapter FPS Range 370 400 Style:Blue White NINJAPK68D closed bolt system so you are able to adjust the poppet valve (firing air) and nozzle (feeding) independently for full control over both the loading time and air volume used The short post version will fit most customers