Designed specifically for use with any size Grey Man Tactical Rigid MOLLE Panel, this rifle rack system uses two heavy duty rubber clamps and instead of just bolting it to the panel, we have designed and fabricated special aluminum backer plates that are threaded. This allows a flush mount where the bolts screw directly into the backer plate which acts as both washer and nut. This prevents any hardware from sticking out the back and cutting into seats etc. Multiple holes are drilled and tapped in the backer plates allowing for vertical or horizontal mounting of your AR-15 or other rifle system. All you need is a Rigid MOLLE Panel and a Phillips head screw driver, this kit has everything else you need.