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Smooth interior, no locating ridge or hop mound
Provides an longer, even, smooth contact surface against the BB
Ideal for use with Prometheus flat-hop nubs
Compatible with almost all Airsoft AEG barrels
For Tokyo Marui, G&P, Matrix and other compatible Airsoft AEG hopup units
Features: + Smooth interior, no locating ridge or hop mound + Provides an longer, even, smooth contact surface against the BB + Ideal for use with Prometheus flat-hop nubs + Compatible with almost all Airsoft AEG barrels Compatibility: For Tokyo Marui, G&P, Matrix and other compatible Airsoft AEG hopup units Material: Silicone rubber Manufacturer: Prometheus