Previous/Next - Upper Authority

Latest Articles

Partially assembled AR-15 with upper receiver, lower receiver, bolt carrier group, and magazine on a workbench

Builds

Budget AR Build Guide: Smart Parts and Cost Breakdown

2 months ago

Complete AR-15 upper receiver assembly with handguard and barrel on a neutral background

Equipment • Upper Receivers

Best AR Upper Receivers by Use Case

2 months ago

Close-up of an AR-15 upper and lower receiver separated at the takedown pins

Upper vs Lower Receiver: Key Differences Explained

2 months ago

Mil-Spec vs Commercial AR Parts: What Actually Matters

2 months ago

Close-up of an AR-15 bolt showing locking lugs and front face against a black background

Bolt Carrier Groups • Equipment

Bolt Carrier Group Parts: Complete Breakdown and Function

2 months ago

Close-up of an AR-15 bolt carrier group showing the carrier body, gas key, and bolt face against a black background

How the Bolt Carrier Group Works: A Clear Breakdown

2 months ago

Close-up of an AR-15 receiver area showing the upper and lower receiver, trigger, magazine well, and optic mounted on the rail

How an AR-15 Works: Complete Cycling Process Explained

2 months ago

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

AR-15 Parts List: Complete Breakdown of Every Component

2 months ago

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

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

2 months ago

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

What Is an Upper Receiver? Complete Breakdown

3 months ago