Action Army 6.03mm AEG Barrel 540mm midcap This is the best airsoft

This is the best airsoft USP we've ever handled

If you want more quantity

Tracer rounds are the non-bio (polished polymer plastic material) variety

Mounts on any top rail of your airsoft gun

Action Army 6.03mm AEG Barrel 540mm midcap This is the best airsoftThe Action Army 6. 03mm AEG Barrel 540mm. 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.