Inner Barrel Prometheus EG 6.03 G&G ARP9/ARP556 128 mm

This Prometheus EG G&G ARP9/ARP556 inner barrel is based off of the very well appreciated Tokyo Marui barrels. Small tolerances (+/- 0.01 mm) and a very precise finish make sure (quality) BB’s will have a tight fit inside the barrel that has an inner diameter of 6.03 mm. This will result in a lower loss of pressure and a very consistent seal around the BB, making for better accuracy. The outer diameter is 8.5 mm.

The Prometheus EG G&G ARP9/ARP556 inner barrel is made of rigid high quality stainless steel. It will be much harder to deform than an original barrel, meaning it can take a bit more abuse too. A Prometheus inner barrel offers the following advantages:

• More robust
• Better accuracy