It allows the shooter to use opposing channels to lock the bag into place when shooting from blinds, fences, shooting houses, rocks, logs, branches, and rails of ladder or climbing stands.
The opposite channel creates a groove to seat your rifle with rock solid stability.
Makes an excellent rear bag and is handy as a cushion, glassing and even a pillow for that midday nap.
Comes with ITW Nexus Tac Link to attach to your belt, pack or sling.