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ISO 300
by Turkey08 - 05/19/25 09:32 AM
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Joined: Dec 2002
Posts: 2,037
8 point
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8 point
Joined: Dec 2002
Posts: 2,037 |
I have a DPMS AR10 that my son is hunting with. It was originally for me but he has kind of taken to it. The issue I've noticed is that every time I chamber a round it is making a light mark I assume with the firing pin. I have checked it and it seems to do it every time. My son is only 9 and we climb and hunt together. It may be fine but I don't like the idea of it possibly going off when putting a round in. Here is a pic. Tell me what y'all think 
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Joined: Nov 2011
Posts: 11,809 Likes: 2
Booner
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Booner
Joined: Nov 2011
Posts: 11,809 Likes: 2 |
If it's denting the primer at all, it's too much for my taste. That's a pretty solid little rap as it's closing to be doing that.
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Joined: Nov 2015
Posts: 2,021
8 point
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8 point
Joined: Nov 2015
Posts: 2,021 |
Looks like to me the firing pin is sticking out too far outside the bolt.
I would rather be tried by 12, than carried by 6.
Famous redneck last words -- Hey y'all watch this... Hold my beer.
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Joined: Oct 2012
Posts: 3,995
10 point
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10 point
Joined: Oct 2012
Posts: 3,995 |
I wouldn’t load that again until a qualified gun smith looked at it. WAY to much at stake to risk it.. IMO
Lone Watie: I'm glad you stopped me when you did. I might have killed her
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Joined: Jan 2018
Posts: 531
4 point
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4 point
Joined: Jan 2018
Posts: 531 |
That’s very common on all my ar type rifles. It’s the floating firing pin. If you put a magazine in and chamber and extract a round they all have that tiny dot from the firing pin. All mine do. Research more online to ease your mind though.
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Joined: Oct 2013
Posts: 2,901
10 point
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10 point
Joined: Oct 2013
Posts: 2,901 |
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Joined: Dec 2012
Posts: 16,401
Old Mossy Horns
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Old Mossy Horns
Joined: Dec 2012
Posts: 16,401 |
That’s very common on all my ar type rifles. It’s the floating firing pin. If you put a magazine in and chamber and extract a round they all have that tiny dot from the firing pin. All mine do. Research more online to ease your mind though. This it's perfectly normal
We will burn that bridge when we get there
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Joined: Apr 2017
Posts: 4,597
10 point
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10 point
Joined: Apr 2017
Posts: 4,597 |
That’s very common on all my ar type rifles. It’s the floating firing pin. If you put a magazine in and chamber and extract a round they all have that tiny dot from the firing pin. All mine do. Research more online to ease your mind though. normal when bolt slams shut the firing pin freefloats ( doesnt have a spring to keep it held back) its not near enough to set that primer off . Every AR platform rifle ever made will do it
Last edited by GKelly; 01/22/18 07:19 PM.
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Joined: Jan 2014
Posts: 10,555
Lucky Bastage
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Lucky Bastage
Joined: Jan 2014
Posts: 10,555 |
I don't know that I've ever noticed my AR doing that....?....But, I'll look at it this evening.
The fool tells me his reasons; the wise man persuades me with my own.
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Joined: Nov 2014
Posts: 2,369
8 point
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8 point
Joined: Nov 2014
Posts: 2,369 |
U need to get that looked at by a professional
Cat doctor
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Joined: May 2010
Posts: 6,129
(Can't Keep It Up...)
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(Can't Keep It Up...)
Joined: May 2010
Posts: 6,129 |
That’s very common on all my ar type rifles. It’s the floating firing pin. If you put a magazine in and chamber and extract a round they all have that tiny dot from the firing pin. All mine do. Research more online to ease your mind though. normal when bolt slams shut the firing pin freefloats ( doesnt have a spring to keep it held back) its not near enough to set that primer off . Every AR platform rifle ever made will do it This. 100% normal
"In Alabama, we prefer to kill small bucks on big properties"-Turkey247
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Joined: Jan 2014
Posts: 6,738
14 point
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14 point
Joined: Jan 2014
Posts: 6,738 |
I would still have it checked out. Especially since it's you and your son taking it. Better to be safe than sorry.
Free men aren't equal and equal men aren't free! I choose to defend my freedom!
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Joined: Sep 2012
Posts: 20,202 Likes: 7
Freak of Nature
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Freak of Nature
Joined: Sep 2012
Posts: 20,202 Likes: 7 |
100 % normal. Floating firing pin. This is why it is so important to be sure primers are seated correctly if you are reloading ammo for an AR. Primers should be seated about .003-.005 below the case head. If they are flush or protruding above the case head you can get a slam fire which could set off a chain reaction.
Last edited by AU338MAG; 01/23/18 03:41 AM.
Dying ain't much of a living boy...Josey Wales
Molon Labe
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Joined: Dec 2013
Posts: 474
4 point
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4 point
Joined: Dec 2013
Posts: 474 |
One of mine was doing it. I had it fixed. Was like $25.
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Joined: Aug 2014
Posts: 21,281 Likes: 2
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
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Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
Joined: Aug 2014
Posts: 21,281 Likes: 2 |
100 % normal. Floating firing pin. This is why it is so important to be sure primers are seated correctly if you are reloading ammo for an AR. Primers should be seated about .003-.005 below the case head. If they are flush or protruding above the case head you can get a slam fire which could set off a chain reaction. while terrifying and extremely dangerous, it'd be kinda cool to see if it was planned out. Imagine an entire mag of handloads with the primer not seated deep enough....Full Auto City
There are 3 certainties in an uncertain world:
1. All Politicians Are Liars
2. All Gun Laws Are an Infringement
3. Taxation Is Theft
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Joined: Jan 2008
Posts: 3,703
10 point
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10 point
Joined: Jan 2008
Posts: 3,703 |
100%% normal, all my AR's (6.5 Grendel and .223) do this. As others have said, its due to the floating firing pin.
It is what it is.
Inspect what you Expect.
Hunting TN, AL, KY, and IL.
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Joined: Mar 2017
Posts: 906
My head is in my ass.
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My head is in my ass.
Joined: Mar 2017
Posts: 906 |
After reading this entire thread, 8 people say it's not right, 6 people say it's normal, hmmm? So, I go and check mine. It makes a very slight indention when chambered in my .223
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Joined: Nov 2011
Posts: 11,809 Likes: 2
Booner
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Booner
Joined: Nov 2011
Posts: 11,809 Likes: 2 |
Checked mine this morning. Colt 6920LE in .556 Chambered and unchambered 5 rounds each from three diff manufacturers ammo. Independence, Federal and PMC. Not a single round had even a scratch on the primer.
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Joined: Oct 2008
Posts: 31,221
Grumpy Old Man
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Grumpy Old Man
Joined: Oct 2008
Posts: 31,221 |
My opinions and comments are my own. They do not reflect the position or political opinions of Aldeer or any of the Aldeer administration.
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Joined: Sep 2012
Posts: 20,202 Likes: 7
Freak of Nature
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Freak of Nature
Joined: Sep 2012
Posts: 20,202 Likes: 7 |
100 % normal. Floating firing pin. This is why it is so important to be sure primers are seated correctly if you are reloading ammo for an AR. Primers should be seated about .003-.005 below the case head. If they are flush or protruding above the case head you can get a slam fire which could set off a chain reaction. while terrifying and extremely dangerous, it'd be kinda cool to see if it was planned out. Imagine an entire mag of handloads with the primer not seated deep enough....Full Auto City I'll load some up with primers sticking out a little and let you test 'em in YOUR gun. 
Dying ain't much of a living boy...Josey Wales
Molon Labe
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