The Hostile AEG Raze QC Gearbox Shells with 8mm Bushings #6R are factory replacement gearbox shells designed specifically for Hostile Raze series AEG rifles. Manufactured to factory specifications and equipped with pre-installed 8mm bushings, these gearbox shells feature a quick-change spring system for easier maintenance and spring swaps. An ideal foundation for gearbox rebuilds, repairs, or replacement while restoring reliable performance and proper gearbox alignment.