As a result, many AR-15/M16 users have come to view piston guns with skepticism. But one piston gun that stands out from the crowd is the Adcor Defense Brown Enhanced Automatic Rifle, or B.E.A.R.

The piston and regulator contained most of the fouling but cleaned up easily. The amount of fouling on the bolt and bolt carrier was much less that what I usually see in a direct gas system AR.

Sturm, Ruger & Company, Inc. announced the availability of three, AR-style upper receiver assemblies featuring the innovative two-stage, piston driven performance of the SR-556 family. These ...

Compatible with any AR-15 mil standard bolt and most piston bolts, the Can Cannon ($399) is now, as of April 2016, 100% legal in the United States and not considered a firearm (‘Murica!). And ...

The LWRC International IC-SPR Rifle is a premium AR-15 powerhouse. It’s ultra reliable. The handling is awesome. And it’s lightweight. But is it worth the hefty price tag? Read on to find out ...

Here's a closer look at receivers and accessories for America’s Rifle that accommodate folding stocks, helps cut costs or improves downrange accuracy.

What is an AR-15 rifle, and why is it so popular. A similar firearm was used by the Jacksonville, Florida shooter at a Dollar General, officials said.

I refer to my go-to AR-15 as a Honda Civic. The Sig Sauer MCX Virtus Patrol (chambered in 5.56) is more like a Lexus. It’s somewhat of a luxury rifle, something you get when you can afford it ...