
www.ModulusArms.com | AR-15 Jig Instructions
shown in figure 1.4, right. Modulus Arms suggests that the user work up to a comfortable depth
not to exceed ¼” depth of cut based on adjustment of router speed and user experience.
Figure 1.4: Router to mill out trigger-slot ¼” at a time (left) and final cut depth set with “A” depth gauge
Figure 1.5: Example of partially milled trigger slot (left) and complete trigger slot (right)
Step 2: Rear Shelf
Configure jig for drilling: The template is installed with the rear pocket template closest to the buffer as
shown in figure 2.1 with the drill guide installed. DO NOT install the rear takedown screw/nut for this step.
Make sure all three holes are fully visible. If the right most hole is partially covered, the drill template is
upside down.
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