This one's for all you clone builders out there. 

B5 Systems has taken the venerable design of the Crane NSWC designed SOPMOD buttstock and incorporated the features sought by military professionals and firearm enthusiasts. The Enhanced SOPMOD features color matched steel hardware, one piece anti-rotation quick disconnect sling mounts, no slip cushioned buttpad, sure grip stock latch, and dual water resistant storage compartments. The Enhanced SOPMOD is made of Mil-Spec materials and finishes. Proudly made in the USA.

These are for MILSPEC buffer tubes. 

ITAR Restricted. 

Cannot ship outside of the United States or to forwarding addresses. No exceptions.