A firearm handgrip includes a housing and a bipod movable between stored and deployed positions. The bipod is adapted for panning (horizontal rotation), tilting (up-down) and canting (right-left) movements when deployed and includes a torsion spring enabling tracking a horizontal angle for quick leg realignment. The bipod includes a piston, a deployment spring between the piston and the housing, and a locking assembly for holding the bipod in the stored position. The locking mechanism preferably first and second magnet pieces respectively located on a release ram near the top of the housing and on the piston. Alignment between the magnet pieces in a first ram position holds the bipod in the stored position while movement to a second ram position creates magnet misalignment for bipod release.