Tightbore 6.03mm EG Precision Barrel 260mm 

EG Barrel series precision
barrels by Prometheus are compatible with majority of AEG replicas.

Barrels from this
series are considered one of the best precision barrels on the market. This is
due to the barrels having low deviation regarding caliber differences on the
inside of a barrel and undergoing rigorous quality assurance. The barrels are
made in Japan and are manufactured in a very precise way from stainless steel.

EG Prometheus barrels
are also much more equal, stable and definitely more straight on the inside
than majority of other products available on the market.

We recommend
using precision barrels only with precision BBs for peak performance.