Firearms Facts: DI vs Piston
This guide breaks down the fundamental differences between Direct Impingement (DI) and Piston operating systems in firearms, primarily focusing on the AR-15 platform. Expert analysis from Iraqveteran8888 highlights the mechanics, advantages, and disadvantages of each system, including historical examples and practical considerations like heat management and suppressor use. Understanding these systems is crucial for firearm maintenance and performance optimization.













