AR-15

Uniquely chambered, CMMG's Mk57 line is soft shooting and hard-hitting.

The Mk12 Mod 0 is a heavily customized AR-15 for mid-range sniper use. Here’s how to build your own.

Like day and night, the AR-15 and AK-47 were designed for different purposes and achieve their ends disparately. Which one is right for you?

Mossberg shoots to improve AR accuracy with the release of the economical JM Pro Adjustable Match Trigger.

When you really need a short, handy AR-15, nothing beats an SBR truck gun.

Engineers at Wilson Combat took a fresh look at its cutting-edge ARs and decided to create a dedicated 9mm platform — the AR9 series.

Before you crack into the gas system proper, it's good practice to check the status of your gas rings.

Finding the best AR-15 to suit your needs is simple, if you know what you're looking for.

No need to get crazy, here are five affordable AR-15 rifles that get the job done.

Light, compact, manageable and accurate, the AR-15 for home defense has all comers beat hands down.

Informal tests might suggest an AR's gas system is to blame for a carbine's issues, but there are false positives that can muck up troubleshooting efforts.

With a tough exterior housing, Aimpoint's new ACRO P-1 is as resilient a reflex optic as there is today.

Following on the heels of the 5.56 SAINT Pistol's success, Springfield has introduced a .300 BLK model.

The new tack-driving BT-3 from Rock River Arms performs as good as it looks

To troubleshoot an AR gas system, the first step is figuring out if the gas system is to blame.

Pitching a massive hunk of lead at a greater velocity than in nearly anything in its class, Wilson Combat's .458 HAM'R Ultimate Hunter puts other large-bore ARs to shame.