A: The “Halo” Charging Ring is designed to fit onto
Ruger Mark III, Mark III 22/45, and Mark IV.
Step 1: Lock the bolt back in the open position.
This allows easy access for attaching the
charging ring to the bolt.
Step 2: Slide the “halo” Charging Ring onto the
back of the bolt, perpendicular to the bolt grips.
Step 3: Twist the “halo” Charging Ring so that it is
level with the bolt. The curved side should be
facing down.
Step 4: Install and tighten the included 5-40 3/4”
socket cap screw. Do not overtighten the screw.
The charging ring grips tightly to the bolt. Some
blue loctite on the threads of the screw is
recommended to keep it from loosening.
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Answer provided by: Erin (7/26/2017)