I have heard many talk about polishing parts and wondered if you all could list the parts that are commonly polished to help with trigger and overall function of the gun. Mine has had no problems and I really do not have any complaints but I am curious about which one's are commonly polished and the reason for it.
Also, I have heard many talk about the sear and the sear block. Which part is this exactly and what function does it serve? Thanks for your help.

Shoot the gun. It's like polishing the internals without polishing the internals.

Sounds good, it keeps getting better with more rounds.

I'm happy without add-ons (Other than the ndzperformance SS takedown bar).

The one thing that really smoothed the trigger pull was to put grease on the right side of the trigger bar, where it rubs against the inside of the plastic body. If you pull the trigger and watch or feel that area, you will notice that the trigger bar rubs there.

I also put a little grease where the trigger bar contacts the sear but there is very little sliding there when the trigger is pulled.
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I have looked at the movement of the sear as the trigger is pulled. It really has very little vertical movement. It seems to me that any polishing there would drastically alter the release point. I agree with others who say to just shoot the gun to let it self polish. I just found another thread with a lot of discussion about polishing, effects on warranty, and on performance. Guess I won't polish anything.

That's pretty much what I do...seems to work.

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USMC 83'-87', NRA Member.

I posted that putting grease between the trigger bar and the plastic housing smoothed the trigger pull.

Now I noticed something new and wonder whether anyone else has noticed the same thing. If you have please comment-

1. When the gun is broken down and you actuate the trigger it seems that the trigger bar rubs lightly against the inside of the plastic body but doesn't really push on it.

2. When the gun is assembled and you pull the trigger you can actually see the side of the body move as the trigger moves. It seems that when you put the slide on it somehow causes the trigger bar to move further out from the center, towards the right. You can see or feel this movement.

Anyone else notice this? (SD9VE)

I suppose this has been posted somewhere on this forum, but it's a presentation of a very rational polishing process, on a Glock. There is nearly a one-to-one relationship between the parts polished on the Glock to the parts I see in my SD9. If this is a repeat post let me know and I will delete this. Have a look here:

https://www.youtube.com/watch?v=3_PuY29jsis

I am curious , do you actually use polish ? What kind ?

-I used 1200 grit wet/dry paper to get it smooth. But one thing I DID NOT TOUCH was the sear and the hook on the striker. I polished the trigger bar assembly only. After polishing it with the sandpaper to remove all burs, stamping/machining marks, I cleaned everything. Then everything that I polished, I repolished with Flitz metal polish. It made the trigger bar look almost like a piece of chrome. I didn't use any lube on the side of the trigger bar where it rubs along the frame. The only parts I dabbed lube on was the return spring and where the bar sits in the notch of the sear block to cock the striker back.

That, along with the Apex spring kit I put in, dropped the trigger pull down to between 6lbs 1oz to 6lbs 4oz. These were the averages after many 10 pull tests with a pull gauge. It is also buttery smooth now. No grit can be felt while slowly pulling the trigger or slowly releasing it. Must say that I am extremely happy with it now. Maybe took an hour of polishing and about 10-15 minutes replacing the springs...

L8R,
Matt

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SD40-VE owner and proud of it!