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Competitive Shooting

AR-15 Barrel-Twist Rates

A barrel-twist rate is expressed in a chain of numbers that reflects on how far down the barrel a bullet must travel to make one full rotation. To fully understand barrel twist, read this article.

Firearms

AR-15 Barrel Basics, Part 2

In Part 2, High Master Glen Zediker writes about important considerations in choosing a barrel for your AR-15, including contours, length, life expectancy, crowns, cryo treatments, and chambering choices. Read this article article to learn more.

AR-15 Stainless Chromoly Rifle Barrels by Glen Zediker

Firearms

AR-15 Barrel Basics, Part I

The difference between a rifle that shoots well and one that shoots very well is in the barrel. The standard for “shoot well” is ultimately subjective, but some manufacturing factors contribute to accuracy, the author explains, and some don’t.

How To

The Long-Range AR-15, Part 2

Part 1 of this series described the path the AR-15 took to become a viable longer-range rifle. In Part 2, Glen Zediker gets into the details of ammunition and gun accessories to make the 500+ yard AR a reality.

Heavy Barrel AR-15

How To

Long-Range Shooting with the AR-15

Long-range shooting with an AR-15 means different things to different shooters. However, the basics of achieving long-range accuracy come down to two things—barrels and bullets. Here’s a history of how refinements in those crucial areas got started.

Black bolt carrier assembly on a light gray background

Firearms

Bolt-Carrier Assembly: The Heart of an AR-15

The AR-15’s bolt and carrier are the heart of the rifle, so knowing the ins and outs of the bolt carrier — weight, platings and coatings, firing-pin hole size, and bolt choices — can make your AR run more smoothly and reliably. Read this post to discover how to keep your AR-15 working properly with the right bolt carrier assembly, firing pin holes and firing-pin retainers.