If you're building or buying a 9mm AR-platform carbine (commonly called an "AR9"), one of the first and most important decisions you'll make isn't about the barrel, the trigger, or the optic — it's about magazine compatibility. Unlike a standard 5.56 AR-15, which uses a universal magazine well, AR9 lowers are split between two competing standards: Glock-pattern and Colt-pattern magazines. Choosing the wrong one — or building a lower that isn't compatible with the mags you already own …

If you've ever shopped for a rifle scope, you've likely run into two mysterious acronyms staring back at you from the spec sheet: MOA and MRAD. Both are angular measurement systems used to help shooters dial in windage and elevation adjustments, but they work in fundamentally different ways. Choosing the wrong one — or not understanding the one you already own — can cost you accuracy at the range and confidence in the field. This guide breaks down exactly what MOA and MRAD mean, how …

If you've spent any time in gun-related news lately, you've probably noticed one word attached to almost every headline: Bruen. A court strikes down a waiting period — Bruen. A federal judge rules on suppressors — Bruen. A Supreme Court case about carrying a handgun into a restaurant — Bruen again. It isn't a coincidence. New York State Rifle & Pistol Association v. Bruen is the 2022 Supreme Court decision that rewrote the rulebook for every Second Amendment case in the cou …