Madbull Top Rail Gas Block for M4/M16 series
Madbull Top Rail Gas Block
Full Metal Construction
Convert your Gas Block with RIS ready in just seconds
Take off your original M4 front sight and put on fancy gas block.
Attach on M4/M16 Type Barrel for firm attachment
20mm Flat Top Rail allow attachment of tactical Laser, Flashlight..etc
Suitable for Marui Compatible M4/M16 Airsoft Barrel