I would go against this. You don't want it attached to you rifle cause you're stuck in settling into the position that bag sits into. Took those tips from my buddy Phil Velayo @gunwerks
https://www.instagram.com/velayo_0317 give him a follow.. drops knowledge bombs
You don't want those legs or whatever you call them get tangled up or overlap as you set your rifle on the prop.
Look at the way Dave Preston goes about it using a Solo Sack. Thats how I try to go about it with my wax canvas game changer..