...but just a peek. Coming to the LongShot website in just a couple more days MAX. We call them Shot-LOC. We use the Magpul M-LOK design with the windows machined into our shroud tubes, and then use a recessed and modified M-LOK configuration on the bottom of our rails. The result....M-LOK configured picatinny rails that can be mounted on a radius and shroud! Brand new, US Patent Pending design.....and only available from LongShot. And you can mount on both the bottom AND the top....or on each side when turned 90 degrees. J.