SI Advanced Receiver Extension - Black
- Materials: 7075-T6 Aluminum
- Tube Dia. 1.145"
- Color: Black
- Weight: 3.8oz
- 1x 7-Position Advanced Receiver extension
- 7-position MIL-SPEC diameter buffer tube
- Fits onto any standard AR15 receiver.
- Finer length of pull adjustment.
- Supported buffer retainer
- Compatible with Strike Industries Pit Viper Stock
NOTE: Not compatible with rifle length buffers or rifle length springs. Cannot work with the A5 buffer system. Internal length of buffer tube is the same as a standard carbine buffer tube