BOW MASTER CNC Aluminum Enhanced Adjustable Ventilation Piston Set for UMAREX / VFC MP5 GBB V2

Crafted from durable CNC-machined aluminum, this adjustable ventilation piston set is designed for UMAREX / VFC MP5 GBB V2 models. Its precision engineering allows fine-tuning of FPS performance, enhancing reliability and consistency during operation. Ideal for enthusiasts seeking expert-level customization and improved gas blowback efficiency.