The Guardian 4s17™ is one of our top selling rifle armor solutions. The 4s17 is a level IV stand alone plate that provides armor-piercing protection at an affordable cost. Engineered with a ceramic strike face and PE backing, the 4s17 is DEA compliant and is NIJ 0101.06 compliant “Certified” by NIJ and can be found listed on the NIJ’s CPL (Compliant Product List).