KRG impact action mod

Jcarpenter223

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Oct 26, 2018
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Im sure it's been covered in threads but after a ton of research I couldnt find a thread that covered WHAT exactly to file away.

Hopefully this helps those who are going to run the krg impact action combo.

This little ridge around the screw is what needed to be reduced. As well as a low profile screw head, which I just filed down as well
20190426_092114.jpg

Using a small, flexible file I slowly started to reduce that lip. Of course it helps to tape off the surrounding areas to avoid unwanted filing.20190425_201841.jpg

After a few hours of filing and checking the trigger hanger clearance I finally got enough material removed. I did test this without the front trigger hanger screw installed.
IMG_20190425_202211_557.jpg

I went to the local hardware store to match threads and bought a couple spares. Took them home and filed down one of them to be low profile. It now sits flush without any wobble from the hanger or screw.
20190426_093146.jpg
 

Jcarpenter223

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Oct 26, 2018
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Update:

1/4-28×1/2" front screw with a few washers stacked under the spine of the chassis...will need to order the same diameter and thread for the rear but needs to be 1 3/4" or 2"...will have to find someplace local.IMG_20190426_221252_234.jpg
 

Jcarpenter223

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Oct 26, 2018
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Another update...KRG sent out a long enough action screw. ( 1 3/4" long, same thread pitch as the front screw) IMG_20190428_190820_102.jpgCant say enough about the customer service from them. Grabbed a birchwood casey black touch up pen for aluminum (looks like a blue capped sharpie) and took care of the raw aluminum showing. Matched pretty well. Takes several time to go over it but ut matches flawlessly. Apply, let dry, wipe away with finger, repeat. When done add a drop of oil on it, wipe excess and youre done.
 
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Jcarpenter223

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Oct 26, 2018
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Thank you for the write up!!!! Should be pinned with as much as this subject comes up
It couldve gone by faster if I had a mill or something mechanical but I had the time and was in no rush.

Low profile hanger screw, low profile trigger guard screw and that little bit of material was all I needed to get it to sit flush.

Oh and the screw lengths were another variable but nothing major.

If it can be pinned id be cool with it. Help those out that are looking for the same combo.
 

chachi609

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May 7, 2019
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I wish I had seen this before starting work on my whiskey 3 impact combo.

I was working the same slow process of shaving off material when I broke my front trigger hanger screw. Unfortunately it is flush with the bottom of the action, and that screw is so damn tiny it makes extraction nearly impossible. I’m debating whether to send it off or just finish the instal without that screw, seems like a tight enough fit that it’s not necessary. I know that’s not the right answer but I’m impatient and don’t want to go through the hassle of sending it back to Altus...
 

Jcarpenter223

Sergeant of the Hide
Belligerents
Minuteman
Oct 26, 2018
180
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37
Oklahoma City, OK
I wish I had seen this before starting work on my whiskey 3 impact combo.

I was working the same slow process of shaving off material when I broke my front trigger hanger screw. Unfortunately it is flush with the bottom of the action, and that screw is so damn tiny it makes extraction nearly impossible. I’m debating whether to send it off or just finish the instal without that screw, seems like a tight enough fit that it’s not necessary. I know that’s not the right answer but I’m impatient and don’t want to go through the hassle of sending it back to Altus...
I grabbed a coupler at the hardware store and screwed the hanger screw in so i could file it down. Then grabbed a hack saw i had laying around to cut a line across the screw so i could use a flat head screw driver to unscrew it. Seems to be working thus far just running the action...barrel hasnt been spun up yet. Got too many logs on the fire to finish it right now. :(
 

TSpork

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May 17, 2017
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Los Angeles, CA
I grabbed a coupler at the hardware store and screwed the hanger screw in so i could file it down. Then grabbed a hack saw i had laying around to cut a line across the screw so i could use a flat head screw driver to unscrew it. Seems to be working thus far just running the action...barrel hasnt been spun up yet. Got too many logs on the fire to finish it right now. :(
Thoughts on just cutting the trigger hanger instead of the chassis? Not sure if it’ll work. I don’t even have an action yet
 

Jcarpenter223

Sergeant of the Hide
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Oct 26, 2018
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Oklahoma City, OK
Thoughts on just cutting the trigger hanger instead of the chassis? Not sure if it’ll work. I don’t even have an action yet
I didnt check how far the screws actually go into the action. Im not sure if theyre tapped to a certain length or all the way through the action like the action screws are. If they arent, removing that much material (equal to that as the ridge that i removed) would probably cause the screw to stick out anyways. Not 100% sure, i just know from talking with krg cs that the pics they sent, other people had removed the shelf.
 

TSpork

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May 17, 2017
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Los Angeles, CA
I didnt check how far the screws actually go into the action. Im not sure if theyre tapped to a certain length or all the way through the action like the action screws are. If they arent, removing that much material (equal to that as the ridge that i removed) would probably cause the screw to stick out anyways. Not 100% sure, i just know from talking with krg cs that the pics they sent, other people had removed the shelf.
Ah gotcha. I’ve never used a trigger hanger before, and actually don’t even know what they look like. I’m about to order my action and am very excited. Going to be my first custom action. Now that there is a write up on how to do the mod, I’m going to jump in and do it. That was one of the things holding me back from getting an Impact
 

Jcarpenter223

Sergeant of the Hide
Belligerents
Minuteman
Oct 26, 2018
180
68
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37
Oklahoma City, OK
Ah gotcha. I’ve never used a trigger hanger before, and actually don’t even know what they look like. I’m about to order my action and am very excited. Going to be my first custom action. Now that there is a write up on how to do the mod, I’m going to jump in and do it. That was one of the things holding me back from getting an Impact
I went back and forth heavily with krg and impact through emails and private messages to figure out what i needed to do. I was seeing too many posts not being as specific so i figured id try to help out. My contribution as a newbie lol