ERGO Picatinny Rail M4 4 RAIL Extender
- Stand-alone rail system for AR/M4 weapons with a standard A1/A2 front sight base
- Allows for attachment of Picatinny rail mounted accessories forward of the front sight base
- Provides extended hand hold opportunities for shooters
- Installs onto A1/A2 front sight base, locking inside the front sight – requiring NO modification to firearm