Upper Authority | AR Platform Education & Comparison

Fundamentals

AR Platform Explained: Complete Beginner Guide

1 month ago

Exploded blueprint view of an AR-15 platform rifle showing separated modular components including upper receiver, lower receiver, handguards, stock, and magazines

Fundamentals

What Is an Upper Receiver? Complete Breakdown

4 weeks ago

Close-up of an AR-15 upper receiver showing the ejection port and top rail

Fundamentals

What Is a Lower Receiver? Function, Parts, and Legal Overview

4 weeks ago

Close-up view of an AR-15 lower receiver showing the trigger, safety selector, and magazine well

Fundamentals

AR-15 Parts List: Complete Breakdown of Every Component

3 weeks ago

Blueprint-style diagram of an AR-15 rifle showing internal and external components

Clear, no-BS guides to AR-15 parts, builds, and legal basics.

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