The AR-10 platform, chambered in .308 Winchester (7.62x51mm NATO), offers significant advantages over its smaller .223 Remington counterpart, boasting greater stopping power and longer effective range. A crucial component contributing to the rifle's accuracy and longevity is the barrel, and within that, the chrome lining plays a significant role. This article delves into the specifics of chrome-lined barrels, focusing on Criterion barrels specifically, and explores the benefits and considerations for choosing one for your .308 AR build.
Understanding Chrome-Lined Barrels
Chrome-lining is a process where a thin layer of chromium is electrochemically deposited onto the barrel's interior. This creates a hard, corrosion-resistant surface that significantly extends the barrel's lifespan. The benefits are numerous:
Advantages of Chrome-Lining:
- Increased Durability: Chrome resists wear and tear from fouling, significantly extending the barrel's life, especially with high-volume shooting.
- Enhanced Corrosion Resistance: Chrome provides exceptional protection against rust and pitting, crucial in various environmental conditions.
- Easier Cleaning: The smooth, hard chrome surface facilitates easier cleaning, reducing the effort required to maintain the barrel's cleanliness.
- Improved Accuracy (Potentially): While not always guaranteed, some shooters report improved accuracy with chrome-lined barrels due to the consistent surface finish.
Potential Drawbacks of Chrome-Lining:
- Slightly Reduced Accuracy (Potentially): Some argue that the chrome lining can slightly reduce accuracy compared to a non-chrome-lined barrel, though this is often debated and depends on various factors.
- Manufacturing Variations: The quality of chrome-lining can vary between manufacturers.
Criterion Barrels: A Closer Look
Criterion Barrels have earned a strong reputation among AR builders for their quality and precision. Their .308 barrels are often chosen for their performance and attention to detail. While specific chrome-lining details might vary by model, you can generally expect a high standard of manufacturing from Criterion. Their reputation is built on consistent tolerances, superior materials, and rigorous quality control.
Key Features to Consider in Criterion .308 Barrels:
- Barrel Material: The type of steel used (e.g., 416R stainless steel) significantly impacts durability and accuracy. Check Criterion's specifications for the exact materials used in their specific .308 barrels.
- Profile: Different barrel profiles (e.g., lightweight, mid-length, heavy) affect weight, handling, and heat dissipation. Select a profile suitable for your intended use.
- Twist Rate: The twist rate (e.g., 1:10, 1:11) determines the stability of the projectile and its suitability for different bullet weights. Match the twist rate to your chosen ammunition.
- Gas System: The gas system length (e.g., carbine, mid-length, rifle) affects the cycling of the action and the recoil characteristics of the rifle.
Choosing the Right .308 AR Barrel: Beyond Criterion
While Criterion barrels are excellent, they aren't the only option. Several other reputable manufacturers produce high-quality .308 AR chrome-lined barrels. When making your decision, consider the following:
- Budget: Barrel prices vary significantly depending on the manufacturer, materials, and features.
- Intended Use: The intended use (e.g., target shooting, hunting, home defense) will influence the required barrel profile, length, and features.
- Ammunition: Ensure that the barrel's twist rate is compatible with your chosen ammunition.
Ultimately, the best .308 AR chrome-lined barrel for you depends on a careful evaluation of your needs and budget. Thorough research and comparison shopping are crucial to make an informed decision and build a rifle tailored to your specifications. Remember to always prioritize safety and follow all relevant firearm handling regulations.
