Modulus Arms AR-15 - Trigger and Hammer Pin Hole Drilling

www.ModulusArms.com
March 25, 2015
www.ModulusArms.com | AR-15 Jig Instructions
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Figure 26: Vise configuration for FCG Drilling
Figure 27: Safety Hole Location
Drilling the Trigger and Hammer Pin Holes: Insert the 5/32” drill bit into the drill. Drill the hole shown in
Figure 28 through one side of the lower receiver. Do not drill all the way through. Drill the hole shown in
Figure 29 through one side of the lower receiver. Do not drill all the way through. Flip the jig over and
repeat in the opposing holes. Be sure to always use the hole locations closest to the Template.
 Note: Be sure to be in the correct hole location. If you are not in the correct location you can
damage your lower receiver.
 Note: If a hand drill is being used be sure to hold the drill upright.
 Note: Use a vise, C-clamp or other mechanism to hold the Jig.
 Note: Be sure not to start spinning the drill until after the drill bit is placed into the drill guide or
premature wear will occur.
 Note: Use plenty of WD-40 or cutting fluid and remove the chips regularly.