Dwell time is one of the least understood—but most influential—variables in how an AR-15 functions...
Author - Upper Authority Editorial Team
Bolt Locking and Unlocking Process Explained
The bolt locking and unlocking process is one of the most critical mechanical functions inside the...
Best AR-15 Buffer Tubes: What Actually Matters and What to Buy
Choosing the right buffer tube for an AR-15 build is one of those decisions that looks simple on...
AR-15 Buffer System Basics: How It Works and Why It Matters
The AR-15 buffer system is one of the least visible but most important components in the rifle’s...
Mil-Spec vs Commercial Buffer Tube Dimensions Explained
Understanding mil-spec vs commercial buffer tube dimensions is one of those details that seems...
AR Buffer Tube Compatibility Chart
Understanding buffer tube compatibility is one of the simplest ways to avoid build errors that...
AR-15 Stock Compatibility Guide: What Fits and Why It Matters
Stock compatibility on the AR-15 platform is often misunderstood because most parts appear...
Buffer Tube Types and Differences Explained
Buffer tubes are often treated as simple hardware, but they play a central role in how an AR-15...
Gas Key Staking Explained: Why It Matters for AR-15 Reliability
Gas key staking is one of those details that looks minor until it fails. At a glance, it’s just a...
BCG Troubleshooting Guide: Diagnosing AR-15 Cycling Issues
A rifle that fails to cycle correctly is rarely “just a bad part.” More often, it’s a system...
