Infinity OptiFit® - Thumb Safety Installation Instructions

Congratulations for purchasing the most technically advanced components in the world!

CAUTION: All persons in the room must always wear eye protection when disassembling or re-assembling a firearm. Even if you don't plan on working on a portion of the firearm with a compressed spring, proper eyeware provides an extra margin of safety in the event you unintentionally release a compressed spring.

Removal of the Optifit® Safety

Removal of the Ambidextrous OptiFit® Thumb Safety from the frame requires the following simple steps: (Skip to line Four (4) for single sided safeties)

  1. Make certain that the firearm is unloaded.

  2. Insert a .050 Allen Wrench in the small hole located in the right side safety.


    Patent Pending
  3. Turn the screw "clockwise" several turns until the right side safety is released.

  4. Fully cock the hammer.

  5. Rotate the left side safety "clockwise" to the maximum position.

  6. Grip the left side safety serrations and wiggle slightly while pulling away from frame until the safety is released.

  7. Be sure to contain the safety plunger and spring.

Reassembly of the Optifit® Safety

CAUTION: All persons in the room must always wear eye protection when disassembling or re-assembling a firearm. Even if you don't plan on working on a portion of the firearm with a compressed spring, proper eyeware provides an extra margin of safety in the event you unintentionally release a compressed spring.

Installation of a new Optifit® Thumb Safety for the first time must be done by an experienced gunsmith! Reassembly must be safety checked after installation by an experienced gunsmith!

Reassembly of the Ambidextrous OptiFit® Thumb Safety:

  1. Make certain that the firearm is unloaded.

  2. Fully cock the hammer.

  3. Apply antisieze to the threads and bulb end (1 deg taper per side - the end (largest) diameter is approximately .080") of the 4-40 special set screw and to the male/female ends of the respective safeties sides.

  4. Insert the bulb end of the special 4-40 set screw in the hole located in the center of the male fingers of the left side safety.

  5. If the grip safety has been removed be sure that it is placed in position now.

  6. Grip the serrations and insert the .154 dia. pin into the frame.

  7. Line up the boss on the rear of the safety with the top of the "cloverleaf" hole in the frame and insert (up or safety on position).

  8. Rotate the left side safety fully counterclockwise (down or off position)

  9. Insert the .050 allen wrench in the hole in the right side safety.

  10. Grip the right side safety serrations and insert the .154 dia pin into the frame while guiding the ,050 allen wrench into the hex of the special 4-40 set screw. Align the "paddle " on the right side with the "paddle " on the left side. The male straight "square box" of the left side will fit into the female "square funnel" on the right side. There is a one (1) degree taper per side in the female funnel.

  11. While squeezing the left and right side safeties together turn the allen wrench "Counterclockwise".

  12. It may be necessary to turn "Counterclockwise" one quarter turn (1/4) and then tap or squeeze the two sides together. Repeat as necessary until the left and right sides are tight against the frame.

  13. Turn "Counterclockwise" until final tightness has been reached.

  14. The locking system operates in a mechanical fashion similar to Chinese Handcuffs (a/k/a Chinese "finger traps") and does not require the use of any form of locking compound.