Action Army 6.03mm AEG Barrel 310mm Helmets and Accessories Very easy to install so

Very easy to install so you can add longer and bigger batteries in your rear stock/buffer area

and a 14mm threaded outer barrel for muzzle brakes

A metal upgraded assembly upper receiver for use in VSR10 sniper rifles

for use with its factory cylinder

magazine and immediately know if the magazine is filled to capacity and

Action Army 6.03mm AEG Barrel 310mm Helmets and Accessories Very easy to install soThe Action Army 6. 03mm AEG Barrel 310mm. Fits inside AEGs that require this length. This is a 6. 03 inner barrel diameter, so it allows for less jams and tolerances than the 6. 01mm. A very popular choice as an alternative to the Prometheus. One piece high grade metal machined. Precision smooth inner bore with nickel plating. This inner barrel is an upgrade to improve your gun's performance, accuracy, FPS, and range compared to stock gun barrels.