B5 Systems CAR15, Stock, Olive Drab Green, w/ Quick Detach Mount, Mil Spec CAR-1482 B5 Systems is proud to reintroduce the venerable CAR15 buttstock. Perfect for both the retro and minimalist rifle enthusiast. Faithful to the original polymer design" featuring sharp checkering" fixed sling loop" and egress channel for cleaning. Constructed from modern Mil-Spec materials.