B5 Systems SOPMOD Stock, Woodland Camo, w/ Quick Detach Mount, Double the resin and glass of prior SOPMOD stock, makes this stock 2-3 times stronger., Mil Spec SOP-1188 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" non-slip cushioned buttpad" sure grip stock latch" and dual water resistant storage compartments.