6 position Tactical Mil Spec CAR Stock Kit (includes castle nut, buffer, Mil Spec diameter buffer tube/receiver extension, end plate, spring, etc.).

The Mil Spec buffer tube is a great feature because should you want to upgrade your stock body in the future to a Magpul, LMT, Larue, Colt, etc, you won’t have to switch out your buffer tube

All the parts to add an adjustable M-4 style stock to your lower receiver.

Fully compatible with any mil spec lower receiver, not just Rock River Arms.

Part Number: AR0250MS
UPC: 842834107483