Beretta 92/M9 Trigger Upgrade Results: D-Spring, INS Spring, Steel Trigger & Skeleton Hammer Mods!

[Brandon Breeze]

In this video, I walk through a trigger upgrade on a Beretta M9/92, including:

D-Spring install to reduce trigger pull
Steel trigger upgrade (replaces the metal-reinforced plastic unit)
Wilson Combat INS reduced power trigger spring
Skeletonized Elite II-style hammer

For those who would rather read about it than watch the video (TLDR):

Tools Needed

• Hex wrench
• Punch (Glock tool works great)
• Pick tool
• Small flathead screwdriver
• Light grease (I used Slip 2000 & EWG)

Step-by-Step Installation Guide
1. Disassemble the pistol

• Remove the slide.
• Remove the grips with a hex wrench (or flathead).

2. Remove trigger components

• Use a pick to remove the trigger bar spring.
• Remove the trigger bar by disconnecting it from the spring groove.
• Remove the slide catch/release: lift it up and pull while detaching its spring from the frame notch.
• Push out the trigger pin.
• Remove the trigger and factory trigger spring.

3. Install the new trigger assembly

• Drop in the steel trigger.
• Insert the Wilson INS trigger spring assembly in place of the factory spring.
• Install the trigger pin to secure the new trigger.
• Reinstall the trigger bar, aligning it with the spring at the bottom.
• Reinstall the trigger bar spring by sliding it into its slot and hooking it into the bar.

4. Reinstall the slide catch/release

• Fit the spring leg into the channel on the frame that retains the trigger pin.
• Reinsert the slide catch/release, ensuring the spring leg is properly positioned.

5. Install the D-Spring and Skeletonized Hammer

• Remove the mainspring housing/lanyard loop (plastic in this case).
• Remove the factory mainspring, insert the D-Spring in its place.
• Remove the hammer pin and old hammer.
• Grease the pivot and drop in the skeletonized hammer.
• Reinstall the hammer pin.
• Align the D-Spring on the hammer strut.
• Compress the spring and reinstall the mainspring housing.
• Ensure the spring is properly seated and the retaining pin is in place.
• Measuring stock trigger pull (DA avg: 9 lb 3.4 oz / SA avg: 4 lb 0.8 oz)
• Final trigger pull results:
    → DA avg: 7 lb 8.5 oz
    → SA avg: 3 lb flat

Overall, this mod dropped double-action by ~1.5 lbs and single-action by 1 lb. Impressive improvement with simple drop-in parts!

 

[j4ck404]

Where can I get that compensator at? That looks like Robocop’s gun.

 

[jarhead714]

You did all that an no trigger bar?

 

[Brandon Breeze]

You did all that an no trigger bar?

Was not aware the trigger bar was a thing until after I made the video and was poking around Langdons sight. Fortunately, it's about a 5 min swap if/when I do want to swap it.

 

[jarhead714]

Was not aware the trigger bar was a thing until after I made the video and was poking around Langdons sight. Fortunately, it's about a 5 min swap if/when I do want to swap it.

Makes a huge difference!

 

[j4ck404]

Makes a huge difference!

What is the difference? Like not eventually failing/warping.

 

[Brandon Breeze]

What is the difference? Like not eventually failing/warping.

Reduces overtravel and reset distance and may smooth out the pull a little from what I read

 

[ZeroFoxGiven]

I used 600 or 800 grit and wet sanded the backside of the stock factory trigger bar. It just knocks off any high spots that would drag on frame and smooths out the trigger pull feel.

Doesn’t effect the LOP but I did this years ago before the Langdon parts was a thing.

 

[Brandon Breeze]

Wanted to edit the OP, but that's not an option.

Here's the Lanyard Loop Replacement by itself:

TLDR for those who would rather read about it than watch the video:

Beretta Lanyard Loop (Mainspring Housing) Replacement – Instructions Summary

1. Ensure Firearm is Unloaded.
   • Confirm the chamber is clear and firearm is safe.
2. Remove the Slide (Optional but Recommended).
   • Makes access easier for the replacement process.
3. Remove Grip Panels.
   • Use a screwdriver or power tool to remove grip screws and take off both grips.
4. Prepare Replacement Part.
   • Have a genuine Beretta aluminum mainspring housing/lanyard loop ready.
5. Remove the Plastic Lanyard Loop.
   • Use a punch or Glock tool to push out the retaining pin while applying pressure to keep the internal spring tension controlled.
   • Carefully remove the plastic part.
6. Install the Aluminum Replacement.
   • Insert the new aluminum mainspring housing/lanyard loop in place.
   • Reinsert the pin to secure it.
7. Reassemble the Grip Panels.
   • Reinstall the grips and screws.
8. Reassemble Slide (If Removed).
   • Put the slide back on if it was taken off earlier.

Result: Your Beretta now has a durable aluminum lanyard loop, replacing the stock plastic part prone to cracking.

Optional Follow-Up: The mag release button is also plastic and may be replaced—another video will cover that.