Prometheus 6.03mm EG tuning barrel for G&G ARP-556 (128mm)

Prometheus precision barrels are by far the most popular models on the market. The Japanese are notoriously perfectionists and this race shows that too. The barrel is made of steel with an inner diameter of 6.03mm and is the right length for the popular G&G ARP series (ARP-559 and ARP-9). Like any precision barrel, the Prometheus barrel should be cleaned occasionally.

Annotation:

Only good quality BBs should be used for this run.