Installation Basics
 For Rifles And Stripped Receivers.
 
Read And Follow Instructions Provided In The Kit.


  First time installation for a rifle averages 30-40 minutes. 
  Additional rifle installations average 15-20 minutes.
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Installation/Fitting Requires Gunsmithing Skills.
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Gauge Receivers: Lay a blade type .012" automotive feeler gauge across the lower
 receiver above the safety lever. Close and hold the receivers together firmly. If the pin resists 
when pushed or meets resistance passing through the receivers means the shim should work.
 If the pin passed through the receivers with no resistance means the shim may not work.
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  Some Colt upper receivers will not have the machined recess/sear relief example on left.
  Check the recess/relief depth. It should be .090" deep. Width: .750" - .755" example on right.

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 Place one side of the shim against the recess wall, push the opposite side down into recess.
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The shim is fully seated. Surface is level and parallel with the sides of the upper receiver.
 The angled ends are for removing the shim with a screwdriver.
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Close and hold the receivers together firmly. The bore in the upper receiver
 lug should appear to be .003" to .007" above the bore in the lower receiver.
Faint white curve is the bottom edge of the bore in the upper receiver lug.
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Remove the shim from the upper receiver. Write down front, middle and
 curve thickness.
Remove the backing from the Shim Gripper Block. 
Align and press the long side of the shim against
 the adhesive.
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  .
 Place Gripper Block against sanding strip and remove .001" from the shim. After
 surfacing lightly
bevel, scrape or sand the outer edge around the short side of the shim.
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   Install shim, hold the receivers together firmly, check pin travel. If necessary remove the shim and surface again.
 Progress Slowly, Do Not Force The Takedown Pin.   
    The slot in an uninstalled takedown
 pin must align with the spring and detent bore in the lower receiver.
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The shim is surfaced gradually until the takedown pin pushes smoothly through the  
upper receiver lug bore and enters well into the lower receiver bore as shown above.
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The remaining short portion of the takedown pin can be seated
 with the supplied driver. Tap the driver with a screwdriver handle.
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The takedown pin is fully seated and the receivers feel Rock Solid.

Read And Follow Instructions Provided In The Kit.

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