Fully compatible with not just Rock River Arms lower halves but also any other Mil-Spec lower (Colt, Bushmaster, Rock River, Armalite, Spikes, Double Star, Smith and Wesson, DPMS, LMT, etc).
Ready to attach to your lower receiver and fire.Part No. AR03780UPC 842834117758 A layaway plan is also available. Please email us at [email protected] for details