The D-Bag, from Cole-Tac

The D-Bag was specially created as a lower-profile support pad for the RailChanger X system. It contours the bag and provides a solid base on barricades without adding a lot of overall height to your rifle system.

Made of waxed canvas and filled (fill volume is externally adjustable) with a special blend of poly beads and sand-like material, these are a great option for someone wanting a more minimalist approach to the RailChanger X.