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BRN-4 Bolt Carrier Group with Manganese Phosphate Carrier and Chrome Bolt. Now offered with a chrome bolt and manganese phosphate carrier, this BRN-4 BCG is a great upgrade for any BRN-4 or replacement part for MR556 or 416 rifle. The chrome bolt and cam pin make for easy cleaning and offers a great looking surface finish. The extractor has a phosphate finish, as this allows for a grippier interface with brass, ensuring reliable and consistent extraction. The phosphate carrier is hardened to hold up to extreme firing schedules, such as sustained full auto fire. The tail of the carrier is enlarged to prevent tilting from the piston impact. The full length carrier is an M16 type, MR556 compatible upper receivers.
Specifications
- Manufacturer:
- Brownells
- Category:
- bolt-carrier-group
- Caliber:
- 5.56x45mm NATO
- Platforms:
- AR-15
- Weight:
- 12.8 oz
- UPC:
- 050806001978
- MPN:
- BRN-4-MAGPHOS-CHROME-BCG
- Required Component:
- Yes
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$327.47
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$307.90
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$349.99
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