A tapered screw drives the patented PLANAR-LOK outward causing barbed teeth to bite into the interior sidewalls of the frame, locking the ANCHOR into place. This patented design eliminates inward wall flex preventing magazine bind, even with large capacity magazines. The MAGWELL dovetails into the ANCHOR at the rear, as it’s tooth bites into the front of the frame. The patented ANGLE-LOK detent drives the MAGWELL rearward into position, completing the system’s three-way lock up.