Great deal for the price - AIM Sports AR Carbine Length 2-Piece Quad Rail w/ Extended Rail

I'll start by saying that this doesn't fit my Colt SP1 perfectly, but I'm still giving it 5 stars. The rail is 3 pieces: the top section is full length, and there are 2 bottom sections. The forward most bottom section is only a few inches long and goes in front of the front A-frame sight. To fit my SP1 I need to Dremel out a couple of slots so it will clear the bayonet lug. The screws that hold the upper section to and rearward bottom section don't line up perfectly, but its close enough that they can still be installed. Once screwed together this is a VERY solid setup. I'm looking forward to mounting some accessories and testing this out.