This is a neat product from Crye Precision for those who are using their AirFrame Helmet with the Chops for maxillofacial protection as it enables a stable shooting position with it when using a rifle stock. And it also helps one use these pads for various rifles rather than putting a pad on each rifle stock. It just costs US$12.70 at the Crye Precision online store, and another add-on for your 21st Century "300" look.

"The StockPad™ creates a high-friction interface between Chops and rifle stock, providing greater stability while sighting. Each pack contains one adhesive-backed StockPad™ and alcohol wipe for cleaning surface area before application. Left or right side available."