Devices, systems and methods of canting, tilting, and rotating firearms such as rifles relative to fore grip. One version allows for a rocking and canting of the firearm by pivotally attaching an upper portion of expanded legs. Another version allows for a separate canting member to be clamped to both the upper portion of a vertical fore grip and to the lower mounting rail of the firearm. The canting member has portions that cant (move to the left or to the right) relative to one another. An operator can cant the firearm in a free-state or to fixed positions as desired. Another canting embodiment allows for an extra sleeve to compress the legs on the fore grip inward allowing the upper pivoted connection of the legs to move within the lower fore grip housing. Embodiments to allow the fore grip to rotate can also made part of the fore grip.