The M89 Drivelock rail has been proven to be one of the toughest, most rigid rails on the market. The steel Drivelock barrel nut with its extended length, along with the stainless steel anti-rotation dowel, and anti-rotation tabs on the rail keep the rail locked firmly into the upper receiver, giving you the utmost confidence that your rail mounted enablers will remain zero’ed through whatever is thrown at them.
This upper is built with our special Broadsword upper receiver, designed to seamlessly fit our 89 series rails and provided added rigidity and precision.
This upper features out 13.9″ CHF barrel for plenty of hard use with or without a HUWXRX suppressor attached to the pinned and welded flash hider mount.