This rail is used to add a scope to our Military Grade M16 Carry Handle. Sits neatly inside the upper receiver handle. Secured with a knurled thumb nut (so you won't lose the nut when making adjustments in the field). Fully functional Weaver style see through mount with STANAG capabilities.
A must have for carry handle users wanting to add a scope to their marker. Most carry handles will have a mount hole drilled in them for the addition of a scope mount such as this product. Scope mount's post goes through the carry hable hole and is fastened with the thumb screw.