6.03mm EG Barrel 509mm for M16A1, M16A2, M16VN, AUG

Prometheus inner barrels comes directly from Japan with high quality production.

All prometheus inner barrels are:

• 6.03 mm inner diameter
• Made from high quality stainless steel
• Internally polished with precision crown
• Made in Japan

Part of Laylax company, company that is providing products in the japanese market for the better part of 20 years. Laylax is well known for their high manufacturing quality and precise tolerances.