The Strike Industries Advanced Receiver extension brings an updated aesthetic and increased functionality to an often neglected, yet highly important component of the AR15/AR10 weapon system.  The scalloped surfaces decrease friction with tight fitting stocks, and shaves weight while retaining mass in critical stressed areas.  Further enhancements include a supported buffer retaining tab that also serves to more easily index your receiver extension.  The SI Advanced receiver extension is machined from 7075-T6 aluminum for much greater strength than your standard 6061 tubes.  Upgrade your AR and stand out from the pack with the SI Advanced Buffer Tube.

Strike Industries Aluminum 7075-T6 Advanced Receiver Extension for M4 GBB Rifle (Dark Earth)
7075 T6 Aluminum Construction
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