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

Disassembled AR-15 components arranged on a workbench, including upper receiver, lower receiver, bolt carrier group, and buffer system

AR Platform Fundamentals: How the System Works

4 weeks ago

AR-15 bolt carrier group with bolt extended next to a barrel extension on a workbench

AR-15 Headspace Explained: What It Is and Why It Matters

4 weeks ago

Close-up of an AR-15 upper receiver on a workbench with the gas block, gas tube, and partially removed bolt carrier group visible.

AR-15 Dwell Time Explained: How It Affects Cycling and Reliability

4 weeks ago

AR-15 bolt carrier group on a dark workbench showing bolt lugs and carrier body

Bolt Locking and Unlocking Process Explained

4 weeks ago

Several AR-15 buffer tubes and related components arranged on a dark workbench surface

Accessories • Equipment

Best AR-15 Buffer Tubes: What Actually Matters and What to Buy

4 weeks ago