The FERFRANS CQB Modular Muzzle Brake System is a two part system consisting of the performance muzzle brake mount + CRD (Concussion Reduction Device) which features a built in quick attach/detach mechanism. 

Madbull Ferfrans Dummy Concussion Reduction Device
- Smooth matte black finish
- Adds asthetics on both AEG and GBB rifles
- Licensed design for realism and durability
- Inner dummy comp and outer reduction device 
- Short enough profile for use in CQB and outdoors