SPF to spencer1860 I have a like-new KAC M4 RAS rail system available. It's in nearly MINT condition, installed and have decided to change my setup. The package includes all items pictured, upper and lower rail halves, two 11 rib rails, KAC verticle fore grip and three small rail sections. See link below for additional product details. Please use e-mail or PM for questions. $150 shipped, Priority Mail with in ConUS.