Aimsmall Arms .223 jig instructions FINAL

Aimsmall Arms QD .223 80% Jig instructions
Peck drill method: Use light pressure on drill bit and drill a small amount (.100-.200") and back the drill out of the hole
half way or more to remove drilling chips. Continue until the desired depth is reached or the hole is drilled through the
entire receiver (side holes).
End Mills and Guide Plates: If you are able to, set up your end mills so that the smooth shoulder of the end mill sticks
out far enough from the chuck that you can run the smooth part of the end mill right up to the guide plates, just be careful
that you aren't cutting into the guide plates.
Measuring: The jig is there to hold the 80% and help guide you, a set of calipers and some blue prints should also be
used during the milling process to keep everything within the specs. Measure twice, cut a little, measure again, cut a little,
etc. Go slow until you've done a few of these; you can go faster as you get better at it.
Step 1
Place 80% receiver into jig as shown above and tighten the long side plate bolts (do not over tighten, just make
them snug). Peck drill the holes for the trigger/hammer pins and the selector using a 5/32" drill bit for the two
small holes and a 3/8" drill bit for the larger hole using the side plate with the black bushings. Peck drill all the
way through the receiver.
Step 1
Step 2
Step 2
Using the top plate pictured (above right) install the two locating pins as shown and secure the plate with the
four bolts provided. Do not over tighten the top plate. The pins should go in easily, if you have to force them
you're doing something wrong, make sure the side plates are on the 80% all the way and the side bolts are loose.
After securing the top plate with the four bolts, snug up the two long side plate bolts. Next place the jig in your
vice and snug it down making sure it's flat in the vice.
Using a 1/2" drill bit remove some of the material in the hammer/trigger area by peck drilling three holes to a
final depth of 1.250" (see picture above right). Next use a 3/8" drill to remove some of the material in the small
corner of the hammer/trigger pocket by peck drilling one hole to a final depth of 1.250" (see picture below
right). Next use a 3/8" end mill to finish this area of the pocket, slowly plunge the end mill to half the total
depth of the pocket then slowly follow the contours of the guide plate being careful not to cut into the guide
plate. Repeat at full depth (1.250").
Step 3
Using the top plate pictured below install the two locating pins as shown and secure the plate with the four bolts
provided. Do not over tighten the top plate. The pins should go in easily, if you have to force them you're doing
something wrong, make sure the side plates are on the 80% all the way and the side bolts are loose. After
securing the top plate with the four bolts, snug up the two long side plate bolts. Next place the jig in your vice
and snug it down making sure it's flat in the vice.
Using a 3/8" drill remove some of the material in the rear take down lug pocket by peck drilling two holes to
a final depth of .630" (see picture below right). Next use a 3/8" end mill to finish the pocket, Slowly plunge the
end mill to half the total depth of the pocket then slowly follow the contours of the guide plate being careful not
to cut into the guide plate. Repeat at full depth ( .630" ).
Step 3
Step 4
Step 4
Using the top plate pictured (above right) install the two locating pins as shown and secure the plate with the
four bolts provided. Do not over tighten the top plate. The pins should go in easily, if you have to force them
you're doing something wrong, make sure the side plates are on the 80% all the way and the side bolts are loose.
After securing the top plate with the four bolts, snug up the two long side plate bolts. Next place the jig in your
vice and snug it down making sure it's flat in the vice.
Using a 5/16" end mill center the end mill in the trigger slot guide plate and slowly plunge the end mill until it
has penetrated the bottom of the fire control pocket. Next slowly follow the contour of the guide plate being
careful not to cut into the guide plate.

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