Optimizing Performance: Understanding Short Stroke Piston AR Systems
Direct Impingement: The Heart of the Matter The Basics At its core, the AR-15 relies on a direct impingement (DI) operating system. In essence, the gas tapped from the barrel during firing is channeled back through a gas tube, directly into the bolt carrier group (BCG). This gas pressure then drives the BCG rearward, cycling … Read more