Strike Industries AR Picantinny Stock Adapter comparable with mil-spec AR lower this is ideal for any bufferless AR system is a 1913 picantinny which allowed to install any folding stock of you choice the adapter include the needed tool for instal ,also the QD attachment point is adjustable for left or right hand users ,the adapter is free from scratches ,Note I'm willing to ship as long buyer cover shipping and ,local pick up is ideal.