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Assembly of the Hammer

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Parts needed:

  • A hammer (with J-pin installed)
  • A hammer spring (larger of the two similar springs)
  • A hammer retaining pin

Tools needed:

  • 5/32" drive pin punch


  1. Install spring onto the hammer, ends of spring to rear and shoulder on back of hammer.
  2. Install hammer in the receiver with feet pointing rearward away from hammer.
  3. Use 5/32" punch to retain hammer in place as you insert hammer retaining pin.
  4. Like the trigger pin, you may have to push down and align the holes perfectly in order to push the pin in all the way.
  5. Ends of the hammer spring will rest on top of the trigger pin, with one end in the groove on the trigger pin.
  6. Inserting the hammer pin may require some effort, as the J-pin in the hammer will catch the grooves in the pin.

Ask Yourself: Does the hammer lock to the rear when pushed back?

Ask Yourself: Does the hammer pivot forward when the trigger is pressed?

Ask Yourself: When releasing the trigger, push the hammer back – does it lock and get caught by the disconnector?

Ask Yourself: Does releasing the trigger cause the hammer to pivot fully forward? It should NOT.

Ask Yourself: Does the hammer fall when the trigger is pressed?


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