80% Fail... Will it shoot?

[scbauer]

So, while in the process of finishing an 80% lower, my end mill bit somehow came loose from the router. I'm not sure how it happened, but that's beside the point. What I'm trying to figure out is will this matter? I've looked at my other completed 80% lowers as well as my DDM4, and I don't think this mess-up will effect the performance.

In case it's unclear from the pictures, the rear pocket is where the mistake happened. I feel like the only purpose of the rear pocket is to allow the upper connector to marry the lower, but as long as the hole for the pin is correct (and it was pre-drilled), then the pocket depth doesn't really matter.

What do you say?
* Use it as-is?
* Try to fill the mistake with JB Weld?
* Scrap it, melt it down, and make a frying pan so I can cook bacon?

[Devilmonkey89]

Use it, my endmill slipped and made a huge hole where the trigger drops thru, I slapped a piece of aluminum and jb weld and ran it.

[Calico1404]

You did not affect the safety detent housing so you are fine! Close call.

If anything you can get one of those rubber wedges if you feel too much wobble (if any at all) other than that it just looks homemade and ugly! Congrats! No way to question whether or not you milled it cause you can still remember the sharp pain in your stomach when you noticed the mistake! lol

Slap her together OP, once complete you wont even notice that it happened.

[scbauer]

cause you can still remember the sharp pain in your stomach when you noticed the mistake! lol

Yep, I remember feeling something strange and turning off the router, while at the same time, thinking, there goes 2 hours of my time and $40.

[scbauer]

Thanks for the info everyone. I guess I'll just leave it as-is.

I've also come to realize that I don't even need to touch the rear takedown pocket. It's already milled on the TM 80's that I've got so if it fits my upper, no point to do the extra work. So that's what I'll do going forward.

[golfish]

I've also come to realize that I don't even need to touch the rear takedown pocket. It's already milled on the TM 80's that I've got so if it fits my upper, no point to do the extra work. So that's what I'll do going forward.

Check to make sure an upper will close down on the rear pocket before you put all your tools away and call it good. I found out the hard way that TM doesn't mill that pocket all the way on their Gen 2 lowers, Per ATF

The 6 or so I bought this year all needed to have a couple 1000ths milled out towards the front of the pockets. I had used a Dremel on mine because I gave the jig away.

[LBROLLER]

here is my oops same thing happened to me don't know how. but ended up without a bottom plate.. i sanded the edges smooth and was almost gonna run a CMC trigger but decided I'm just gonna jb weld the plate back on. fill in with some jb weld and then mill down some of the excess.. this was not my first lower by the way lol but STUFF happens lol

[LBROLLER]

another angle

[bohoki]

all mine look horrible inside but nobody sees in there anyway

[NATEWA]

JB Weld and mill it - cerakote/alumahyde and you'll never know you made a mistake.

[HardwoodRods]

Mistake? What mistake. It was all be design

[LBROLLER]

Almost decided to leave mine as is and skeletonize it entirely lol

[scbauer]

Check to make sure an upper will close down on the rear pocket before you put all your tools away and call it good. I found out the hard way that TM doesn't mill that pocket all the way on their Gen 2 lowers, Per ATF

The 6 or so I bought this year all needed to have a couple 1000ths milled out towards the front of the pockets. I had used a Dremel on mine because I gave the jig away.

Good call. I always check my uppers on the lowers before I kill anything and my TM's have been fine. With this one specifically, I had already milled the last little bit and was going around for one last cleaning pass when l, all of a sudden, "why so much resistance?" Then I looked and saw the damage.

So I think we're good. I just called it and sprayed the lower with Alumahyde this morning.

[LBROLLER]

Good call. I always check my uppers on the lowers before I kill anything and my TM's have been fine. With this one specifically, I had already milled the last little bit and was going around for one last cleaning pass when l, all of a sudden, "why so much resistance?" Then I looked and saw the damage.

So I think we're good. I just called it and sprayed the lower with Alumahyde this morning.

I ignored the extra resistance on the clean up pass as well

[BigStiCK]

Serious loss of style points, but bonus man-card points for building an 80%er.
Yer good.