16th Jul 2022
Nitriding and Metallurgical BehaviorGas nitriding is a form of steel heat treatment in which one uses heat to diffuse nitrogen-rich gas onto the surface of the metal with the intention of hardenin…
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24th Jun 2022
The Bolt Carrier Group (BCG) is a critical component of the AR-15 (or M16/M4). The BCG is the “action” of the rifle. It loads a new round into the chamber, fires that round, extracts and ejects the…
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3rd Mar 2022
Steel is one of the most widely used and recycled materials. There are thousands of grades of steel with equally as many applications. There are also different technologies for manufacturing steel, on…
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19th Feb 2022
Carbon Steel Barrels 4140 steel is a type of 4000-series carbon steel that contains 0.80% to 1.10% chromium and 0.15% to 0.25% molybdenum. These two elements make the steel much stronger and harde…
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5th Jan 2022
Twist rate is the measurement of how much the lands and grooves of your barrel's rifling rotate. This determines the kinds of bullets you'll shoot. It's so important for accuracy that it's adverti…
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5th Jan 2022
Barrel Treatments & Coatings The method of production and the type of steel used to make an AR-15 barrel are just parts of the total equation. Picking the right finishing treatment and/or coatin…
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