www.ModulusArms.com | AR-15 Jig Instructions
Note: If you have a shop vacuum, use it. We recommend sticking it between the lower and the
template over the magazine opening. It typically fits and stays. Run the vacuum whenever you
are milling. If you do not have a shop vacuum, stop regularly are remove the chips. If they build
up, they can become stuck between the end mill and the template and melt. This build up can
be removed from the end mill with sand paper. Use of a cutting fluid or WD-40 is
recommended.
Figure 24: Depth Gauge for Rear Shelf