Brn-4 416/Mr556 Complete Bolt Carrier Group

Cartridge: AKK_5.56 mm Nato
Finish: Black Nitride
Make: Heckler & Koch
Make/Model: Heckler & Koch|HK416
Model: HK416


Manufacturer: Brownells
Model: The "BRN-4 416/MR556 Complete Bolt Carrier Group" is a specific bolt carrier group (BCG) designed for use in firearms that are compatible with the Heckler & Koch (HK) 416 or MR556 platforms, which are variants of the AR-15/M16 style rifles. The BCG is a critical component of a semi-automatic or automatic rifle, and it plays a central role in the firearm's operation. Here are some key points about this BCG: Compatibility: The BRN-4 416/MR556 Complete Bolt Carrier Group is designed to be compatible with firearms that use the HK 416 or MR556 platform. These platforms are popular in military and law enforcement applications. Function: The bolt carrier group is responsible for extracting and ejecting spent cartridge cases, chambering new rounds, and locking the bolt into the barrel extension during the firing cycle. It is a crucial part of the rifle's semi-automatic or automatic action. Complete BCG: A "complete" BCG typically includes the bolt carrier, bolt assembly, and firing pin. These components work together to cycle the firearm. Quality: Quality BCGs are often manufactured to high standards to ensure reliable functioning and longevity. It's important for a BCG to be well-machined and properly finished to function effectively and reduce wear. Maintenance: Regular maintenance and lubrication are necessary for the proper functioning of the BCG. Cleaning and lubricating the BCG helps prevent malfunctions and extend the life of the firearm. Legal Considerations: It's important to ensure that any firearm components, including the BCG, comply with local, state, and federal laws and regulations.