Caldwell Accumax Universal Bipod, 6-9 Height, Black 1081953 Caldwell's ACCUMAX 6"-9" Universal Bipod lets you have a bipod on your AR without all the extra weight of adaptors. Designed to mount directly to either M-LOK or KeyMod handguard with adaptors for both styles included. Get a top quality Caldwell bipod on your AR without any extra weight to slow you down.