For many buyers, a PSA vs BCM comparison is not really about brand loyalty. It is about deciding...
Author - Upper Authority
Budget AR Build Guide: Smart Parts and Cost Breakdown
Building a reliable AR-15 on a budget is not about finding the cheapest parts. It is about...
Best AR Upper Receivers by Use Case
Choosing the best AR upper receiver is not just about picking a brand or price point. It is about...
Upper vs Lower Receiver: Key Differences Explained
If you are new to the AR platform, the terms upper receiver and lower receiver can sound more...
Mil-Spec vs Commercial AR Parts: What Actually Matters
“Mil-spec vs commercial” is one of the most repeated distinctions in the AR platform—and one of the...
Bolt Carrier Group Parts: Complete Breakdown and Function
The bolt carrier group is the central moving assembly inside the AR platform. It handles locking...
How the Bolt Carrier Group Works: A Clear Breakdown
The bolt carrier group (BCG) is the mechanical core of the AR-15 platform. It controls firing...
How an AR-15 Works: Complete Cycling Process Explained
An AR-15 works by using gas pressure from a fired cartridge to cycle its internal components, eject...
AR-15 Parts List: Complete Breakdown of Every Component
Understanding an AR-15 starts with knowing what makes it function as a complete system. At a basic...
What Is a Lower Receiver? Function, Parts, and Legal Overview
A lower receiver is the central structural component of an AR-15 platform. It houses the fire...
