Description
The Double Bell 721 gas magazine lip and rubber router set replaces two components at the top of the matching Glock-series magazine. The lip retains the next BB for loading, while the rubber gas router forms the magazine’s gas-transfer interface with the replica’s loading system.
Product details
- Manufacturer: Double Bell
- Model application: 721
- Listed pistol family: Glock
- Components: magazine lip and rubber gas router
- Repair set; complete magazine not included
Compatibility and care
Use the Double Bell 721 designation and original magazine parts to confirm fit. Glock describes the platform style, not universal compatibility with every brand or generation. Inspect the follower and surrounding fittings when diagnosing feeding problems, and check the gas-router contact surface when investigating leakage. Fit to a magazine made safe and fully depressurised. Avoid damaging the lip’s retaining hardware or pinching the rubber router, then check retention and operation before use.









