Trigger will not engage On 80% AR-10

[doki]

Hey guys I am inquiring on my AR-10 I built like a few months ago, I finally got the desire to finish building it and then.... I got Stuck!!! So i milled it out in my garage and finished it! so happy!!!!

Here is the deal when i installed my trigger to test the tolerance, my trigger does not engage, it seems i drilled my trigger pin hole like a thousandth off I am so ANNOYED!!! is there a way i can fix this issue? I have attached a video showing the issue, if there is a smith that can help me. please do help im desperate now, I have my entire setup just looking at me lol

<iframe width="640" height="360" src="//www.youtube.com/embed/we4T2gE2r14" frameborder="0" allowfullscreen></iframe>

I can't even embed right!!! lol

https://www.youtube.com/watch?v=we4T2gE2r14 please see the link for the issue its easier to see it than to read it

[kcstott]

First off try it with the selector installed then report back

[doki]

Selector did nothing , If you want me to post a more clear video let me know I will do anything lol

[Granite]

I'd try an already proven lpk. Could be a manufacturers defect.

[bohoki]

you can use a needle file to oval out the holes and it will still function make sure the hammer can move free and easy you can even oval those holes a little forward as the hammer should hit the disconnector then bump a little forward then catch on the front of the hammer you could even stone your trigger sear a bit back


relax nothing is ruined yet


just take it slow get used to installing and disassembling a bunch of times

[doki]

okay, so the disconnector that is assembled with the trigger seems to engage too much, so in the video as you see, i have to press the disconnector so that it is fully released.

hope that help i cant take pictures of it when its assembled but i can see whats going on.

[doki]

okay well it is a DPMS ar 10 lpk so i know thats not the problem.

[baih777]

is that a Quentin Defense 80% ?

[Reelemup]

okay well it is a DPMS ar 10 lpk so i know thats not the problem.

Dpms and Armalite lowers have different locations for the holes.

[kcstott]

BTW it's not an AR 10 it's a LR308 patern.

There's no way in hell i'd ever egg out a hole to fix this.

All I can say is you are going to have to double check your dimensions and then figure out what is not in spec.

[Pauliedad]

So I'll admit I boogered up a hole once on a naked 80%.
I did egg the hole first then tig welded the goofy side. A few minutes of filing and all was fine.
If it had already been an anodized one I would have had a bigger issue. Was pretty easy to deal with and is still functioning fine.
I second KC, don't egg it out as a fix. Sounds dangerous to have a wobble in the thing that makes bullets go bang. No upside.

[6mmintl]

Is the milled trigger hole in the bottom of receiver long enough/located in right place ? does trigger stop/crash in elongated hole restricting travel?

[Intimid8tor]

okay well it is a DPMS ar 10 lpk so i know thats not the problem.

Which LPK are you using. It should be a LR-308 LPK not an AR10 LPK.

[ar15barrels]

okay, so the disconnector that is assembled with the trigger seems to engage too much, so in the video as you see, i have to press the disconnector so that it is fully released.

Re-time the disconnector.
Go read the install instructions for the JP gunsmith-fit trigger and then apply what you learn in there about disconnector timing to your fire control parts.
I could offer to help you with it, but you don't list your location in your profile so I have no idea if you are withing driving distance of me or not...

[Eagle Eyes]

Yea check your trigger hole because if that is not correctly positioned the rear of the hole is to far forward it can catch and stop the trigger from moving completely back but feels like it is fully back.

Good thing is filing on the trigger hole to move it a bit back will not make anything worst.

Otherwise what AR15 said.