Overview Reviews Product Description High grade precision barrel from Prometheus at 6.03mm diameter for extra power and precision shooting. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Prometheus 6.03 229mm EG Tight Bore Inner Barrel Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments