The Hostile AEG Fuze Gearbox Shells with 6mm Bushings #6F are factory replacement gearbox shells designed specifically for Hostile Fuze series AEG rifles. Manufactured to factory specifications and equipped with pre-installed 6mm bushings, these gearbox shells provide a durable foundation for gearbox rebuilds, repairs, or replacement. Ideal for restoring reliable performance and proper gearbox alignment.