Durkin Premium 5.56 Nickel Boron BCG

Description

• .223/5.56 NATO
• Nickel Boron finish
• M16 cut
• 9310 steel carrier
• Carpenter 158 steel bolt
• 4140 steel extractor
• MIL-SPEC O-ring
• MIL-SPEC gas rings
• 4140 steel cam pin
• 8740 steel firing pin with hard chrome finish
• Magnetic particle inspected

Proudly made in the U.S.A.