The AR-15 bolt carrier group (BCG) is a crucial component of the AR-15, housing the bolt, firing pin, and extractor. It is made of various materials, including 158 Carpenter Steel and Nickel Boron, an advanced metal finish that offers high resistance to wear and corrosion. A good Parkerized/Phosphate BCG will perform better than a cheap one marked up for a coating that doesn’t offer much over standard offerings and can cause more issues.
There are loads of different BCG coatings available, including chrome, phosphate, nitride, nickel boron, Diamond-Like Carbon (DLC), titanium nitride (TiN), and NP3. Nickle Boron (NiB) is an inferior coating for the AR Bolt, Extractor, and Carrier, and it is a downgrade on all levels. Common AR-15 bolt carrier group coatings include nickel boron and phosphate.
Nitride/Melonite DLC (Diamond-like-coating), Phosphate/Parkerized NiB (Nickel Boron), TiN (Titanium Nitrate), Chrome NP3 AR-15 SEMI-AUTO, and NP3 (nickel teflon) are some of the common BCG coatings. Nitride is a salt bath that yields a hard coating, very durable, and can be used with TiN, NiB, and DLC coatings.
Choosing the best AR15 BCG involves considering various factors, from materials to performance. Nitride is a salt bath that yields a hard coating, making it very durable.
📹 Ep-7: How Does the AR-15 Bolt Carrier Group Work? Which One Do You Need?
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What are the disadvantages of phosphate?
Phosphate buffers have several disadvantages, including promoting algal or fungal growth as a nutrient, causing cations to be isolated and precipitated, inhibiting enzymatic reactions, and precipitating in ethanol. They are also susceptible to contamination and cannot be used in experiments to precipitate RNA or DNA. To prepare and prepare Phosphate Buffer (pH 5. 8 to 7. 4), follow these bulleted points.
Is Nickel Boron a coating?
Nickel boron is an alloy composed of 95% nickel and 5% boron, offering a non-toxic, environmentally friendly coating that provides better wear resistance and corrosion protection than hard chrome. It can be increased in hardness through heat treatment. The nickel boron plating process uses electroless plating, an autocatalytic reaction, unlike traditional electroplating that requires an electric current.
This method is similar to electroless nickel-phosphorous plating, a common finishing technique for various metal substrates. A nickel-boron coating offers even greater wear resistance than EN-P. The process can be enhanced through heat treatment.
What is the best coating for AR-15?
Bear Creek Arsenal uses an in-house process to anodize its aluminum parts, creating a hard aluminum oxide coating that is resistant to corrosion and wear. The process involves suspending the aluminum parts in an acidic bath and applying an electric current between the anode and cathode electrodes. This creates “pores” in the metal, allowing it to accept dyes and secondary coatings like traditional black used for AR components.
Cerakote, a ceramic-based finish, is a popular choice for firearms due to its extreme resistance to wear, impact, and corrosion. With 90 available colors, Cerakote allows manufacturers to produce firearms in a wide array of vibrant hues. Both methods contribute to the durability and aesthetic appeal of firearms.
How durable is nickel boron coating?
Nickel boron coatings, typically ranging from 65 to 70 HRC, are highly hard and resistant to abrasion, making them ideal for applications like firearms and industrial machinery. These coatings are applied in thicknesses ranging from 0. 0003 to 0. 0007 inches, providing significant enhancements in hardness, corrosion resistance, and low friction without altering the treated parts’ dimensions. Nickel boron does not rust like iron, but can corrode under certain conditions, reducing the risk of rusting on the coated surface. The protective layer created by nickel boron nitride prevents oxidation and other environmental factors that typically lead to rust.
What is the difference between Milspec and commercial AR?
Mil spec and commercial buffer tubes are used in AR-15 rifles, with mil spec tubes being designed to meet military standards and having a flat end plate and specific diameter that fits mil spec stocks. These tubes are made from 700 series aluminum, such as 7075, which is stronger and more durable. Commercial buffer tubes, on the other hand, are made from 600 series aluminum, such as 6061, and have a slanted end plate and slightly larger diameter. This difference in material and design affects the strength and compatibility of the tubes with different stocks. Mil spec tubes are commonly used in military and high-performance applications.
Does Nickel Boron wear off?
Nickel Boron Nitride coatings are durable and designed for longevity in severe operating conditions. They are less likely to wear off under normal usage due to their hard and wear-resistant properties. Regular maintenance and proper application can significantly extend the lifespan of a Nickel Boron Nitride coating. These coatings offer excellent corrosion resistance, reducing the risk of rusting on the coated surface. The unique composition of Nickel Boron Nitride creates a barrier that protects the underlying metal from oxidation and environmental factors that lead to rust.
However, its effectiveness can be compromised if the coating is damaged or excessively worn, exposing the metal beneath. A Nickel Boron Nitride coating works by depositing a thin layer of alloy onto the surface of a metal part through an electroless plating process, enhancing its hardness, wear resistance, and corrosion resistance.
Is phosphate or nitride better?
The choice between nitriding and phosphate finishes in a gun depends on its intended use. A nitride exterior protects the barrel longer than a phosphate exterior finish, but a chrome-lined or phosphate barrel is better for sustained fire. Nitride offers slightly better accuracy and price, but phosphate coated/chrome lined barrels are more common. Faxon Firearms experts believe nitride is the ideal blend of performance, accuracy, and practicality for shooters.
Why use nickel boron BCG?
Our nickel boron bolt carrier group is a superior choice compared to standard chrome due to its increased resistance to wear and corrosion. This results in a longer-lasting bolt carrier group that is more durable than other options available on the market. Our 11. 6-ounce bolt carrier group has been rigorously tested to withstand any potential challenges, ensuring its longevity and durability. The nickel boron BCG is a key component in our product line.
Is Nickel Boron, or nitride better?
The choice between nickel boron and nitride coatings in gun coatings depends on individual preferences, gun usage, and financial constraints. Nickel boron is preferred for its appearance and rust protection, while nitride is ideal for hard wear protection and cost-savings. Both types of coatings have improved technology, making firearms stronger and more attractive. However, the choice between the two depends on personal preferences, budget, and the desired finish.
To make a good choice, consider factors such as the gun’s purpose, budget, and personal preferences to ensure the chosen finish aligns with the gun’s purpose. ECHEMI reserves the right to revise and explain information at its discretion.
What material is Milspec BCG made of?
MIL-SPEC BCGs are military-grade firearm components made from high-quality steel, designed for durability and withstand extreme conditions. They are often coated with a corrosion-resistant material like phosphate or nitride for enhanced longevity. MIL-SPEC BCGs adhere to specific dimensional and functional requirements, ensuring compatibility with other MILSPEC components for easy maintenance, repair, and component replacement. Some BCGs may also have chrome lining for enhanced durability and easier cleaning.
Risk-based testing, such as Magnetic Particle Inspection (MPI) and High-Pressure Testing (HPT), is conducted to identify potential defects and ensure they can withstand firing forces. MILSPEC BCGs are primarily designed for military use, but they have also gained popularity among civilian shooters seeking robust and dependable firearm components. The MILSPEC designation often signifies quality and endurance. A comparison between K-SPEC and MIL-SPEC can be found in a video.
What is the best coating for an AR-15 BCG?
Nickel Boron is an advanced metal finish that offers high resistance to wear and corrosion, with an ultra low friction coefficient. It is a popular choice for AR-15 BCGs due to its superior lubricity and corrosion resistance. UCT Coatings of Palm City, Florida, uses their patented EXO Nickel Boron finish on AR-15 BCGs for Fail Zero and Toolcraft, and is MIL-SPEC on some Army mortar tube components.
Nickel Boron has the edge over Nitride in terms of slickness and ease of clean up, but it usually costs more and is more expensive. If these factors are important to you, Nickel Boron may be the choice for you. If none of these factors are important, Black Nitride is the best option.
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I plan to use a new 6mmARC build for some medium range competition shooting. What kind of BCG should i get? If the enhanced one thatr are cut to reduce weight are only for weight reduction,then i dont need one of those as i can handle the rifle just fine. But im looking for something that will be 100% reliable if there is such a thing and accuracy,as much as i can get? Thanks and great stuff
So I shot some ones AR and I never felt a light trigger like that before but I do know that the heavier trigger is for close combat to prevent ND but when I pulled the trigger like I always do it fired two rounds so dang fast and it felt nice but I’m wondering why it would shoot that fast. I was trying to release the trigger until I heard the click because I was zeroing my new rifle.
I prefer Cryptek Mystic Black CVD coated bcg’s because they are much easier to clean, nothing sticks to them, nothing is more wear resistant and nothing is slicker. I also like there precise machining tolerances they keep as close as we do in the benchrest world. 2nd choice is Iron City Rifle Works Black Diamond bcg
Because the ar15 is chambered for 556/223 the barrel is milled accordingly. How accurate can a 9mm or 22lr round be just because the bolt is changed for that round? with all the tolerances being as they are its hard to fathom the round not jumping around going down the bigger bore barrel? Did I make any sense?