The FN Bolt Carrier Group (BCG) is a critical component in the operation of AR-15 style rifles, responsible for chambering rounds, extracting spent casings, and resetting the firing mechanism. Renowned for their firearms manufacturing excellence, FN (Fabrique Nationale) produces BCGs that are sought after by firearm enthusiasts and professionals alike.
Construction and Materials
FN’s BCGs are typically machined from high-quality materials to ensure durability and reliability. The bolt is often crafted from Carpenter 158 steel, a material specified in the military’s Technical Data Package (TDP) for its strength and resilience under high-pressure conditions.
The carrier is usually made from 8620 steel, known for its toughness and ability to withstand the rigors of repeated firing cycles. These components are commonly finished with a phosphate coating, providing corrosion resistance and a matte black appearance.
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Compatibility and Specifications
FN manufactures BCGs that adhere to M16 specifications, meaning they are “full-auto” rated. This designation refers to the weight and design of the carrier, which is compatible with both semi-automatic and select-fire (automatic) AR platforms.
It’s important to note that using an M16-style BCG in a semi-automatic AR-15 is legal and often preferred for its added mass, which can aid in recoil management and reliable cycling.
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Availability and Considerations
While FN is a prominent supplier of military-grade firearms and components, their BCGs are also available to the civilian market through various distributors and retailers. For instance, companies like Wet Worx Outfitters have offered surplus FN full-auto BCGs, though availability can fluctuate.
When considering an FN BCG for your rifle, it’s essential to ensure compatibility with your specific AR-15 setup. Additionally, verifying the authenticity and condition of the BCG is crucial, especially when purchasing surplus or used components.
FAQ
1. What is a Bolt Carrier Group (BCG)?
A BCG is a crucial assembly in AR-15 style rifles responsible for chambering rounds, extracting spent casings, and resetting the firing mechanism for subsequent shots.
2. Are FN BCGs considered high quality?
Yes, FN is known for producing high-quality firearm components, including BCGs, adhering to stringent manufacturing standards and materials specifications.
3. Can I use an FN M16-style BCG in my AR-15?
Yes, M16-style BCGs are compatible with AR-15 rifles and are legal to use in semi-automatic configurations.
4. Where can I purchase an FN BCG?
FN BCGs can be purchased through various firearm parts retailers, both online and in-store. Availability may vary, so it’s advisable to check with multiple sources.
5. What should I consider when buying a surplus FN BCG?
When purchasing a surplus FN BCG, inspect for signs of wear, verify authenticity, and ensure it meets the specifications required for your rifle build.
