Brownells BRN-4/HK416 BOLT ASSEMBLY AZT-H&K-416-BOLT-ASSY

Replacement or spare Bolt Assembly for the Brownells BRN-4®. Completely assembled with ejector and extractor. Black nitride finished exterior makes for an extremely hard and durable part. Compatible with HK416 and MR556 rifles.

• Nitride finish
• Complete assembly includes extractor and ejector
• Extractor features black insert with o-ring for positive extraction
• 5.56x45mm NATO / 223 Remington bolt face
• Magnetic particle inspected
• 9310 tool steel