Big Slider - Upper Authority

Fundamentals

AR-15 Gas Port Size Explained: Reliability, Recoil, and Cycling

2 weeks ago

by Upper Authority Editorial Team

Maintenance

Overgassed vs Undergassed AR-15: Symptoms, Causes, and Fixes

2 weeks ago

by Upper Authority Editorial Team

Infographic showing overgassed, ideal, and undergassed AR-15 ejection patterns with recoil and cycling characteristics.

Fundamentals

AR-15 Gas System Explained: How It Actually Works

3 weeks ago

by Upper Authority Editorial Team

Close-up of an AR-15 barrel with gas block and gas tube on a light background

Latest

A bolt carrier group component shown at an angle on a white background

Bolt Carrier Groups • Equipment

What Is a Bolt Carrier Group? Role and Function in an AR-15

1 month ago

person cleaning the interior of an AR-style rifle upper receiver with a brush

Maintenance

AR Maintenance Basics: Keeping Your Rifle Reliable Over Time

1 month ago

Close-up of an AR-15 bolt carrier group showing the gas key and bolt assembly on a white background

Bolt Carrier Groups • Equipment

Best Budget BCG Options for Reliable AR Builds

1 month ago

Two AR-15 upper receivers shown side by side, PSA on top and BCM on bottom, both with 16-inch barrels and M-LOK handguards

Equipment

PSA vs BCM Comparison: Which AR-15 Brand Fits Your Build

1 month ago

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

1 month ago