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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 03-01-2014, 7:26 PM
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Default Is my lower ruined?

Hey guys, so I'm new to the AR world but recently got a lower to start assembling a rifle piece by piece. So while installing my lower parts kit today with the help of this forum and YouTube, I made an error.

When punching in the bolt release, I accidentally hit the punch under the release jamming it between the release and lower receiver. It made an ugly mark on the outside but that's fine with me, but when I saw the inside of it after Assembling the lower, I saw a small line inside the fire control area on the other side of the bolt release. Not sure if that happened by a scratch of something or if it cracked due to the punch being wedged between the lower and bolt release pin.

Here's come cell phone, pics. What do you guys think?
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  #2  
Old 03-01-2014, 7:29 PM
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looks fine to me. Personally I use a set of big pliers with electrical tape on the teeth and press it in. But you will be fine.
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Old 03-01-2014, 7:31 PM
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I don't see a line?
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  #4  
Old 03-01-2014, 7:31 PM
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Picture? I'm a visual type if person.
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Old 03-01-2014, 7:32 PM
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Looks like a scratch....should be good.
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Old 03-01-2014, 7:35 PM
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My bad... I must have responded before the pic loaded... LOL!
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  #7  
Old 03-01-2014, 7:36 PM
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Oh no! It's FUBAR'd!!
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  #8  
Old 03-01-2014, 7:39 PM
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Here's the inside view pic.
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  #9  
Old 03-01-2014, 7:39 PM
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just get a black marker and do a touch-up....it works for me!
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Old 03-01-2014, 7:40 PM
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Yeah it's all f'ed up. Ill take it off your hands for $10
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  #11  
Old 03-01-2014, 7:40 PM
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it's worthless. sell it to me for $1
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  #12  
Old 03-01-2014, 7:49 PM
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Thanks for the replies. The line on the inside is the one that worried me as it was directly on the other side of the exterior mark.
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Old 03-01-2014, 7:51 PM
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Sorry that second picture came out bad. Hopefully this one is better.
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  #14  
Old 03-01-2014, 7:51 PM
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Quote:
Originally Posted by Newb View Post
Thanks for the replies. The line on the inside is the one that worried me as it was directly on the other side of the exterior mark.
There is absolutely zero chance you hit it hard enough to crack it.
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  #15  
Old 03-01-2014, 7:54 PM
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I see the dings but a picture of the inside would be more useful. I don't see anything resembling a crack on the outside though, and it's pretty hard to believe you could crack that area with a punch. Get a black sharpie and cover up the mark and get on with your life...

Update: That's what I get for not hitting reload on and old window before commenting. After seeing the new pictures I still think its fine.
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Old 03-01-2014, 8:04 PM
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Quote:
Originally Posted by chead View Post
There is absolutely zero chance you hit it hard enough to crack it.
You haven't seen OP's hammer...

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Old 03-01-2014, 8:05 PM
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pretty sure that scratch happened when you installed the hammer and you didn't notice

its easy to bump the sides when you are fighting the spring and trying to get a pin to start

judging by the hammer pin hole you has a bit of a battle
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Old 03-01-2014, 8:14 PM
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Is that a crack along the same line as that scratch on the inside?
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Old 03-01-2014, 8:16 PM
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When you rub your fingernail over it does it feel like a crack? Does your nail go into the line?
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  #20  
Old 03-01-2014, 8:17 PM
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LOL at the Thor reference. I wish I had the power to summon the great Mjölnir, then an AR wouldn't be needed. I actually used a small craftsman two sided hammer.

And yes, I had quite a battle with that roll pin. I tapped and tapped and tapped till I finally gave it a hard hit, causing the punch to slip under the pin. But as long as the damage is only cosmetic, it's fine with me. I figure it's going to get more scratches being used on the range anyway.

I'm definitely not putting together my own upper. Going to keep checking on PSA's website till I find a setup I'm hoping for.
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  #21  
Old 03-01-2014, 8:17 PM
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I could be wrong, but it looks like a fracture to me judging from the pictures, inside and outside locations look to be opposite of each other.
The pictures could be misleading, have someone qualified check it out for you.
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  #22  
Old 03-01-2014, 8:19 PM
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Quote:
Originally Posted by rvicta View Post
Is that a crack along the same line as that scratch on the inside?
I don't think it's a crack and hope it's not.

Quote:
Originally Posted by triggs75 View Post
When you rub your fingernail over it does it feel like a crack? Does your nail go into the line?
No when I rub my fingernail over it, I feel nothing.
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  #23  
Old 03-01-2014, 8:20 PM
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Its still kinda hard to see the "crack" in your third picture. I really don't think its possible to fracture your lower with what you described above unless you were really pounding on it.
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Old 03-01-2014, 8:20 PM
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Quote:
Originally Posted by jb octane View Post
You haven't seen OP's hammer...

BFH will surely get things moving along!
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  #25  
Old 03-01-2014, 8:24 PM
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That's a crack. It's a hair line fracture and your not going to feel it with your finger nail. Take to someone who does non destructive test and have a dye pen done and they'll tell you, That's a crack. Or you could just listen to me. You will be able to feel it with a finger nail after a couple hundred rounds.
Buy billet.
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  #26  
Old 03-01-2014, 8:25 PM
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you lower is fine... but get a set of these: http://www.opticsplanet.com/wheeler-...FY1r7AodsicAjg

makes installing pivot pin and bolt catch roll pin so much easier... it's too late for the recent build - but trust me, you'll want it later (it never ends )
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Old 03-01-2014, 8:26 PM
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OP where are you located?
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  #28  
Old 03-01-2014, 8:27 PM
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For future reference.. Pinch one side of the roll pin with pliers or vice, and insert that end first. Will make your life 10x easier. And don't be afraid of assembling an upper. It's much easier than the lower
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Old 03-01-2014, 8:30 PM
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Quote:
Originally Posted by Ldarshay View Post
For future reference.. Pinch one side of the roll pin with pliers or vice, and insert that end first. Will make your life 10x easier. And don't be afraid of assembling an upper. It's much easier than the lower
dust cover spring is a tricky bugger the first couple times...
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Old 03-01-2014, 8:38 PM
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Slave Pin. You can make one out of a small nail. Reusable too.
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Old 03-01-2014, 8:39 PM
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Wow I thought I was in the clear, now there are people who say it IS a crack
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  #32  
Old 03-01-2014, 8:40 PM
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Quote:
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Wow I thought I was in the clear, now there are people who say it IS a crack
highly unlikely.
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Old 03-01-2014, 8:49 PM
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Take some better pictures and post them.
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Old 03-01-2014, 8:50 PM
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Throw in da gutta, go buy anutta.
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  #35  
Old 03-01-2014, 8:57 PM
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  #36  
Old 03-01-2014, 8:59 PM
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Here is another zoomed in view. It impossible to feel. Perhaps a light coat of jb weld over both sides should make any worries go away?
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  #37  
Old 03-01-2014, 9:01 PM
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Color it with a sharpie. Should b good to go.
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Old 03-01-2014, 9:03 PM
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Quote:
Originally Posted by Newb View Post
Wow I thought I was in the clear, now there are people who say it IS a crack
How about you get a measuring device and see if the scratches on the outside meet the scratches on the inside? It looks like the inside is farther down and you scratched it putting the FCG but didn't notice.
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Old 03-01-2014, 9:13 PM
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Looks like a scratch from the FCG springs when assembled. You would have had to beat the living tar out of that receiver and on the flat side of it. Use a black sharpie on the scratches and it'll look almost like new.
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  #40  
Old 03-01-2014, 9:22 PM
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Dude, tell us where your at and someone will look at it for you.

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