EG 6.03 Precision Barrel - 229 mm The Prometheus EG Barrel series is renowned for its precision and compatibility with a wide range of AEG replicas. Made in Japan with stainless steel and undergoing rigorous quality assurance, these barrels have very low deviation in caliber and boast exceptional stability and straightness. For optimal performance, we highly recommend pairing precision barrels with precision BBs. Perfect for MP5 replicas and similar models, with a length of 229 mm and a diameter of 6.03 mm, weighing approximately 55 g, and manufactured by Prometheus.