An AR-15’s gas port is a small hole drilled into the barrel, but its influence over rifle behavior...
Author - Upper Authority Editorial Team
Overgassed vs Undergassed AR-15: Symptoms, Causes, and Fixes
An AR-15 does not need excessive recoil or violent cycling to function reliably. In fact, the most...
AR-15 Gas System Explained: How It Actually Works
The AR-15 gas system is what makes the rifle self-loading. Without it, the rifle would function...
Best Bolt Carrier Groups by Use Case and Reliability
Choosing the right bolt carrier group is one of the most important decisions in any AR-15 build. It...
Bolt Carrier Group Buying Guide: How to Choose the Right BCG
A bolt carrier group buying guide should do more than list coatings, brands, or price points. The...
Bolt Carrier Group Maintenance: Cleaning, Lubrication, and Wear...
Bolt carrier group maintenance is one of the most practical skills you can develop as an AR-15...
Direct Impingement vs Piston AR: Key Differences and Tradeoffs
Choosing between a direct impingement (DI) system and a piston-driven AR isn’t just a technical...
AR-15 Cycle of Operations: How the Rifle Functions Step by Step
Understanding the AR-15 cycle of operations is the difference between simply owning a rifle and...
AR Platform Fundamentals: How the System Works
The AR platform is often described as modular, reliable, and adaptable—but those descriptions only...
AR-15 Headspace Explained: What It Is and Why It Matters
Headspace is one of those terms that gets mentioned often in technical discussions but rarely...
