AR trigger polish ruins hardening

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[ARCHIVED THREAD] - AR trigger polish ruins hardening

Posted: 2/23/2006 6:13:22 PM EDT

I am new to the AR but I decided to polish my trigger anyway since I have done stuff like this before. I am concerned because I read somewhere that by polishing the trigger and hammer mating surfaces that you could ruin the hardening or something like that.

I just took my Dremel and a little metal polish and buff the surfaces a little bit until they got shiny. Could I have goofed anything up? The rifle shoots fine and the trigger seems a little easier to pull.

Posted: 2/23/2006 6:54:01 PM EDT

[#1]

Doubtful, you would have to get those parts pretty hot to mess anything up.

Posted: 2/23/2006 6:58:08 PM EDT

[#2]

That's just what you needed to do. With a felt pad and some flitz it would take days to hurt anything.

Posted: 2/23/2006 7:31:06 PM EDT

[#3]

The issue is that most of these parts are MIM parts... well, a lot of them anyway. MIM creates a hard outer surface but is pretty soft inside, the damage comes from actually taking that hardened outer surface off and exposing the soft inside (sound like I am describing Easter candy!).

Odds are that you did no damage... if you really need a nice trigger, the best bet is to invest the money in a target grade trigger. Some parts are EDMed and can be worked on without any concern, other than screwing up the geometry so bad that the gun is unsafe!

Posted: 2/23/2006 7:47:49 PM EDT

[#4]

Quoted:
The issue is that most of these parts are MIM parts... well, a lot of them anyway.

Damn you made me look at the bushmaster hammer and trigger I'm not using, yup they r MIM. Hope they are better than these MIM parts

Posted: 2/23/2006 7:52:54 PM EDT

[#5]

Quoted:
Quoted:
The issue is that most of these parts are MIM parts... well, a lot of them anyway.

Damn you made me look at the bushmaster hammer and trigger I'm not using, yup they r MIM. Hope they are better than these MIM parts

That pic is GREAT!

MIM is the industry standard... has worked well up till now. EDM parts are hard to find and a damn sight more costly than MIM anyway...

Posted: 2/23/2006 8:05:15 PM EDT

[#6]

Yea if MIM is done right it's a pretty effective method. So many of the 1911 MIM problem parts can be traced back to changing vendors or their vendors subbing the MIM work out.

That picture cracks me up. I think George Smith of EGW made it.

Posted: 2/23/2006 11:16:47 PM EDT

[#7]

I'm glad the consensus is no harm done. But what do you mean by MIM and EDM?

Posted: 2/23/2006 11:35:48 PM EDT

[#8]

Quoted:
I'm glad the consensus is no harm done. But what do you mean by MIM and EDM?

MIM is metal injection molding and EDM is electrical discharge machining. look them up, the details are pretty nifty.

Posted: 2/24/2006 9:02:48 AM EDT

[#9]

cool thanks for the info.

[ARCHIVED THREAD] - AR trigger polish ruins hardening

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