Your choice of rail, plus the fore-grip and either the butt-stock (SBR kits) or the brace (Brace kits), with every bolt and wrench you need in the box. Option A keeps the iron sights; Option B trades them for rail space.
I am the one behind the CAD files, the material testing, and the quality check before anything ships out. When you order you are getting something built and tested by me personally.