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Installation of the Volquartsen Safety Power Spring for the Ruger® MK IV™

Before We Begin


  • Always make sure the firearm is unloaded before performing any work it!
  • Remove all ammunition from the work area before working on any firearms.
  • Always wear safety glasses when performing any work on a firearm.

Video Instructions

Our Safety Power Spring for the Ruger® MK IV™ increases the force required when going from "fire" to "safe." The increased force addresses those shooters who may inadvertently engage the safety during firing.

Installs in minutes and fits all models of the Ruger® MK IV™ including the 22/45™ and 22/45™ Lite.

Tools Needed

  • Rubber mallet
  • 1/16" Allen wrench
  • 3/32" Allen wrench
  • A clean, non-slip surface, such as our Cleaning Mat


  • Verify, again, that the pistol is unloaded!

Step 1

Separate the pistol upper and frame.

Remove 4 grip screws using the 3/32 Allen wrench and then remove the grips from the pistol's frame.

Remove the bolt release from the frame.

Optionally, place tape over both ends of the sear pin to keep it from falling out of the frame.

Step 2

Move the safety lever to the fire position.

Use the thumb of your non-shooting hand to put pressure on the hammer. Then, pull the trigger to release the hammer.

Step 3

Remove the screw holding the safety lever from the right side of the frame.

Remove the Right Safety Lever.

Using the 3/32" punch, push the Safety Lever partially out of the frame to allow access to the Safety Plunger.

Carefully remove the Safety Plunger and Safety Plunger Spring.

Step 4

Remove the original Safety Plunger Spring from the Safety Plunger.

Install the new Safety Power Spring over the Safety Plunger.

Insert the Safety Plunger and Safety Power Spring back into the Safety Lever.

Slide the Safety Lever back into the frame. Use the 3/32" Allen wrench to help press the Safety Plunger into the Safety Lever to allow it to be fully inserted.

Screw the Right Safety Lever back onto the Safety Lever.

Perform a function check of the Safety, Trigger, and Hammer to ensure proper operation of the frame.

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