Not a good m lok picrail - Lion Gears Tactical Picatinny Rails

Maybe these LionGears "Bridge Mount" ,,,thats what it says on the bag,,, are for something other than a centerfire AR rifle. I used my calipers to check the picrail dimensions and they are in spec , but it has 2 holes, (on one end, and a center screw hole, and no hole on the opposite end). No lugs on the back. Came with two screws, but no MLok T-Nuts. I'll make a bench tool out of it. Maybe prelevel cantilever mounts and scopes before I attach them to the rifle picrail. This picrail is a no go for serious battle rifle implementation. China.