Knights 7.62 URX 3.1 rail fit on DPMS upper?

They will absolutely fit. Though it does take a little work. You will need to bore out the ID of the barrel nut since KAC barrels use a smaller OD barrel extension. I've done a handful of them, so feel free to send me a PM if you need some help.


I usually machine the back of the rail as well while I'm doing the install to eliminate the gap.
[IMG2=JSON]{"data-align":"none","data-size":"full","src":"http:\/\/i43.photobucket.com\/albums\/e398\/unclemoak\/Photo%20Jan%2030%208%2015%2044%20PM.jpg"}[/IMG2]


An FDE set I did for myself.



The fit before boring out the ID of the barrel nut



Skimming a bit off to get it to clock correctly.

 
Last edited:
  • Like
Reactions: Ehtacs and tjdaley
I think the KAC URX is "High" profile so it will mate with an aero 308 upper perfectly, never heard that it has a different OD though. 80 bucks to have it installed isn't bad considering that the "special" wrench required is 200$ or whatever other silly number.

I make those too for substantially less than KAC does.

20160212_172421.jpg
 
  • Like
Reactions: tjdaley and blcouch
Hello Unclemoak, I realize this is an old thread but I am interested in the work you do and had a few questions. First, did the URX rail in FDE show above come in FDE or did you get in creakoted? I am thinking about purchasing a URX rail but I have only found it in black. If I do decide to go this route do you still do the work or sell the wrenches? Thank you.
 
Looking good!!!

[IMG2=JSON]{"data-align":"none","data-size":"full","src":"http:\/\/photos.imageevent.com\/mstn\/bigblockgasguns\/huge\/IMG_5857.jpg"}[/IMG2]

[IMG2=JSON]{"data-align":"none","data-size":"full","src":"http:\/\/photos.imageevent.com\/mstn\/bigblockgasguns\/huge\/IMG_3193.jpg"}[/IMG2]


Very nice. I like the cerakote job who did it? I have a URX rail on order and I need a good place to get it cerakoted.
 
Last edited:
Hello Unclemoak, I realize this is an old thread but I am interested in the work you do and had a few questions. First, did the URX rail in FDE show above come in FDE or did you get in creakoted? I am thinking about purchasing a URX rail but I have only found it in black. If I do decide to go this route do you still do the work or sell the wrenches? Thank you.

It came black and was Cerakoted FDE.

I absolutely still do installatiom work and sell SR25 versions of the URX wrench if you want to tackle it yourself.
 
  • Like
Reactions: ACGuns
It came black and was Cerakoted FDE.

I absolutely still do installatiom work and sell SR25 versions of the URX wrench if you want to tackle it yourself.

Great, Just got the handguard today. I will be sending it off to be cereakoted very soon. I will either have you do the install or just buy the wrench. I have bored out a barrel nut before for a heavy barrel ar15 so I should be able to do it . Can I just PM you when I'm ready to either buy the wrench or have the work done? I saw your post on m4carbine too those wrenches look nice. I can't believe that wrench is so expensive, it is 322 dollars on Optics planet. I plan on only using it once but it would be nice to have If I ever want to take the handgaurd off. Thanks.
 
Last edited:
  • Like
Reactions: tjdaley