Ergo

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. - 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 - Includes Black ERGO LowPro Rail Covers - Weight: 8.7 ounces