Hi I have a black Vltor modstock the full lenth A2 as NIB. Mounted once not taken out. It cones with battery storage conpartments and extra cheak adaptiors. Just pops on over your buffer tube. It will go on car lenth with adaptor(included) or stand. I will also add a Quick detach sling sevial for it $75 shipped prioity mail . Thanks JD42 Check,M/O or paypal +3%.