“Mil-spec vs commercial” is one of the most repeated distinctions in the AR platform—and one of the...
Author - Upper Authority Editorial Team
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...
What Is an Upper Receiver? Complete Breakdown
The upper receiver is the top half of the rifle’s receiver assembly. On AR-pattern rifles, it holds...
AR Platform Explained: Complete Beginner Guide
The AR platform is a modular rifle system built around a two-part receiver architecture and a gas...
Stunning Health Benefits of Eating Chocolates
Master cleanse mumblecore sriracha, whatever typewriter fashion axe PBR&B Echo Park heirloom YOLO...
Why We Love Broccoli (And You Should, Too!)
This is an image post format. Note that if you click on the featured image it will open in pop-up...
