Choosing between a direct impingement (DI) system and a piston-driven AR isn’t just a technical...
Author - Upper Authority
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...
AR-15 Dwell Time Explained: How It Affects Cycling and...
Dwell time is one of the least understood—but most influential—variables in how an AR-15 functions...
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...


