Brn-4/Hk416 Bolt Assembly
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specifications

Manufacturer:

Brownells

Platform:

AR-15

Caliber:

5.56 mm NATO

    Brn-4/Hk416 Bolt Assembly

    Caliber Manufacturer Color Weight Merchant Price Merchant URL
    5.56 mm NATO Brownells None None None $79.99 Brownells Add

    Prices last checked September 2026. Prices and availability change often, so confirm on the retailer's site.

    Replacement or spare Bolt Assembly for the Brownells BRN-4A(R). 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 Mfg: Brownells

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