Layout E - Upper Authority

Layout E (with load more)

Close-up of a rifle barrel showing a highlighted gas port with directional gas flow arrows.

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

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

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

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

AR-15 Gas System Explained: How It Actually Works

assembled AR-15 bolt carrier group resting on a wooden surface

Best Bolt Carrier Groups by Use Case and Reliability

assembled AR-15 bolt carrier group resting on a wooden surface

Bolt Carrier Group Buying Guide: How to Choose the Right BCG

Disassembled bolt carrier group components arranged on a wooden surface, including the carrier, bolt, firing pin, cam pin, and small parts

Bolt Carrier Group Maintenance: Cleaning, Lubrication, and Wear Points

Side-by-side comparison diagram of two rifle operating systems showing gas flow in a direct impingement system and a piston-operated system

Direct Impingement vs Piston AR: Key Differences and Tradeoffs

Bolt carrier group partially extended from an AR-15 upper receiver showing bolt lugs and cam pin on a workbench

AR-15 Cycle of Operations: How the Rifle Functions Step by Step

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

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