RA-Tech, established in 1995, is a Taiwanese company specializing in high-quality airsoft upgrade parts and accessories. They are known for their precision-engineered components, such as the Negative Pressure Adjustable System (NPAS), which allows players to fine-tune their airsoft guns' FPS. RA-Tech's products are designed to enhance performance and durability, making them a preferred choice for airsoft enthusiasts seeking reliable upgrades.