Installation Instructions

FINISH:
A proprietary Nitride (QPQ) Surface Conversion
Process has been performed on this barrel that
makes all surfaces extremely hard.
BOX CONTAINS: This instruction sheet, 1 x AAC Barrel, 1 x AAC Muzzle Thread Protector
PROS:



CONS:

probably ruin your tools, so better hope

  Barrel Vice, Action Wrench, Torque Wrench,
Appropriate SAAMI Go/NoGo Headspace Gauges (Full incremental set recommended).
 Anti Seize compound, Rosin.

STEP 1

a long breaker bar.
Barrels may require considerable torque (over 150 ft/lbs) to remove. Penetrating oil may help free the threads.
STEP 2 Clean oil, grease or debris from receiver barrel threads (acetone is recommended).
STEP 3 
STEP 4 
If it passes, proceed to Step 6.
If fails NoGo, proceed to Step 5.



STEP 5 Thin recoil lug in increments of .001” using a surface grinder.
Surface Grinder recommended, alternate method is 400 grit sandpaper taped to a surface plate.
Recheck headspace until assembly passes both Go and NoGo gauges.


STEP 6 
Apply a thin coating of anti seize compound to barrel threads.

Reassemble gun.



 |  | 770.925.9988

AAC BARREL INSTALL INSTRUCTIONS
WARNING: Installation requires specific tools and headspace adjustment/confirmation. We strongly suggest having the AAC barrel installed by a competent
