Most Recent Posts

Sun Devil Adjustable Carrier Key

Reloading

Reloading 101: Pressure Curves and Port Pressure

When the bullet is sealing the bore, a longer barrel means more pressure is contained for a longer time. The smaller or larger the gas port size, the slower or faster the gas enters the system. The farther back or forward the port is located, the sooner or later. Bullet weight is a factor also: heavier bullets accelerate more slowly (This is also the reason heavy bullets erode the chamber throat faster than lighter bullets). Read the full story to understand pressure curves and port pressures.

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.

AR-15s

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.

Black bolt carrier assembly on a light gray background

AR-15s

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.