Piston vs. DI: Decoding the AR-15’s Operating Systems
The Direct Impingement (DI) System: The Legacy of Simplicity How it Works The direct impingement system is the original heart of the AR-15. It’s the design that Eugene Stoner pioneered, and it remains the most common operating mechanism found within the AR-15 platform. Its beauty lies in its elegant simplicity. The core concept is remarkably … Read more