What can you use for an airsoft bunker?
only do that if you use spring airsost guns under 250fps. I use high aeg with 380fps and my guns tear rite through 2 layers of cardborard. If you own high grade AEGs like me dig a 3 foot trentch and put logs in front of the hole. or if you have chopped wood (15 pieces) dig a 2 foot hole then put two strong sticks in the ground one in front of the other and burry the sticks. then get you chopped wood logs and stack the on top of each other.
