Securing the Workpiece
1. Tighten the jig mounting bolts so that the lower is securely attached to the t-slot plate. The t-slot nuts slide into the t-slot rails from the openings in the left side of the t-slot platform. Make sure bolts thread into the t-slot nuts when mounting the lower-jig assembly.
2. Tighten the jig and lower assembly firmly to the t-slot platform. The jig should fit flush to the lower without bending or deforming. The jig should squarely secure the lower to the t-slot platform so that there is no play in the workpiece.
3. The side or top of the lower should be coplanar to the t-slot platform. Take care when tightening the magazine well jig piece to not push the back of the lower too far down. Tighten the small bolts for the left and right jig piece, then tighten the mag well jig bolt.