Suitable for: M4-A1, SR16, M4, S-System, M4 RIS & rifles sharing similar inner barrel length.
Length: 363mm
Inner Diameter / Bore: 6.03mm
Material: Stainless Steel.
Manufacture: Prometheus. Japan, a part of the Laylax company.

Features:

• Made from High Quality Stainless Steel
• Precision 6.03mm Inner Diameter
• Internally Polished with Precision Crown