AR15 caliber headache

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Pinard

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Ottawa
Edit: Here is the reply I got, case closed!

sure, no problem.
Mit freundlichen Grüssen / best regards

Matthias Hainich
Oberland Arms ohg
Am Hundert 3
82386 Huglfing
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Ok long story short, I bought a OA-15 rifle here, OberlandArms, german brand AR15 platform hit up their website it's great

Here is my problem I had the misconception that every AR was 5.56x45mm chambered.
Seems not, as the receiver indicates it is Kal.223
Now, from what I read, one must not fire 5.56 out of a .223 chamber.
I also read, that civilian versions of certain rifles (such as the Tavor) were stamped .223 but were actually chambered 5.56

Could it be possible that since OA-15 is a civilian market oriented firearm it could be actually chambered in 5.56?

Also checked on the barrel, no stamp regarding ammo.

I have a sh!tload of norinco 5.56 white boxes to go through but can't decide whether I should or not.
 
Last edited:
Pinard said:
Ok long story short, I bought a OA-15 rifle here, OberlandArms, german brand AR15 platform hit up their website it's great

Here is my problem I had the misconception that every AR was 5.56x45mm chambered.
Seems not, as the receiver indicates it is Kal.223
Now, from what I read, one must not fire 5.56 out of a .223 chamber.
I also read, that civilian versions of certain rifles (such as the Tavor) were stamped .223 but were actually chambered 5.56

Could it be possible that since OA-15 is a civilian market oriented firearm it could be actually chambered in 5.56?

Also checked on the barrel, no stamp regarding ammo.

I have a sh!tload of norinco 5.56 white boxes to go through but can't decide whether I should or not.
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I'd say err on the side of caution and not shoot it
laurencen said:
I shoot 5.56 and 223 tho my rifle no issues
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You have an oa-15 too?
 
Have you tried reaching out to the manufacturer to help clarify? They should be able to tell you either right off the bat or based on your serial number...
 
fchan said:
Have you tried reaching out to the manufacturer to help clarify? They should be able to tell you either right off the bat or based on your serial number...
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But just from a legal standpoint you'd have to expect them to say "well what did we stamp there?"
 
fchan said:
Have you tried reaching out to the manufacturer to help clarify? They should be able to tell you either right off the bat or based on your serial number...
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emailed them already, waiting for them to translate my email to german and answer back haha

Waynetheman said:
But just from a legal standpoint you'd have to expect them to say "well what did we stamp there?"
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my guess is that too, tho I tried and see what they will reply
 
Pinard said:
Ok long story short, I bought a OA-15 rifle here, OberlandArms, german brand AR15 platform hit up their website it's great

Here is my problem I had the misconception that every AR was 5.56x45mm chambered.
Seems not, as the receiver indicates it is Kal.223
Now, from what I read, one must not fire 5.56 out of a .223 chamber.
I also read, that civilian versions of certain rifles (such as the Tavor) were stamped .223 but were actually chambered 5.56

Could it be possible that since OA-15 is a civilian market oriented firearm it could be actually chambered in 5.56?

Also checked on the barrel, no stamp regarding ammo.

I have a sh!tload of norinco 5.56 white boxes to go through but can't decide whether I should or not.
Click to expand...

Are you sure the upper of that rifle is the same as your lower?

If yes, OberlandArms makes both rifles, as one is chambered in .223 and some Black Label models are chambered in 5.56mm.
They are all clearly marked .223 or 5.56 on the lower, depending on what they were born.

If you don't know if the upper is the same brand as your lower, you should have a closer look at your barrel.

Most of the time, the rollmarks are towards the end of the barrel, on the outside.

Sometimes, the rollmarks could be closer to the breach, under the handguards/quadrail.

Take the handguards/quadrail with an AR-15 handguard removal tool, and have a look.

Colonel Mustard (Authorized CGN Dealer) sells the tool:
https://colonelmustard.ca/products/ar-handguard-removal-tool

Here's what you can find under the handguards:

wds0LVL.jpg


You can only trust what is marked on the barrel!

Without it, you will have to take the rifle to the gunsmith, get a chamber cast and measure it...

I'll have a look at that video:


As for Norinco 5.56mm, you should really ch
 
The other thing to consider is whether or not your Norinco ammo really is 556 and not 223. I've gone through many crates of the stuff and some of the crates were labeled 556 but contained boxes labeled 223???? The good news is, if you don't feel safe shooting that ammo, you'll have no trouble selling it. This very thread will probably generate a few low-ball offers to take that dangerous norc ammo off your hands ;)
 
First batch of DD rifles came in marked as 223 to get around earlier stricter ITAR regulations. They were actually 5.56. Buy/borrow some go/no-go gauges and see.
 
Let you in on a dirty little secret with SOME gun manufacturers.
5.56 is considered a military chamber. So some countries.... like the USA don't like to have their "Military" style rifles leave the country where they might be used against them. SO, some people stamp their rifles 223 to get around that export issue. This muddies the waters cause now you don't know if you have a 556 or a 223.
 
TheZreturns said:
Are you sure the upper of that rifle is the same as your lower?

If yes, OberlandArms makes both rifles, as one is chambered in .223 and some Black Label models are chambered in 5.56mm.
They are all clearly marked .223 or 5.56 on the lower, depending on what they were born.

If you don't know if the upper is the same brand as your lower, you should have a closer look at your barrel.

Most of the time, the rollmarks are towards the end of the barrel, on the outside.

Sometimes, the rollmarks could be closer to the breach, under the handguards/quadrail.

Take the handguards/quadrail with an AR-15 handguard removal tool, and have a look.

Colonel Mustard (Authorized CGN Dealer) sells the tool:
https://colonelmustard.ca/products/ar-handguard-removal-tool

Here's what you can find under the handguards:

wds0LVL.jpg


You can only trust what is marked on the barrel!

Without it, you will have to take the rifle to the gunsmith, get a chamber cast and measure it...

I'll have a look at that video:


As for Norinco 5.56mm, you should really ch
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the roll mark is not present on my barrel, unless I checked with both my eyes closed. also removed the handguard and checked.
Also their is text missing at the end of your comment.


Runningfool said:
The other thing to consider is whether or not your Norinco ammo really is 556 and not 223. I've gone through many crates of the stuff and some of the crates were labeled 556 but contained boxes labeled 223???? The good news is, if you don't feel safe shooting that ammo, you'll have no trouble selling it. This very thread will probably generate a few low-ball offers to take that dangerous norc ammo off your hands ;)
Click to expand...

JoKa said:
Let you in on a dirty little secret with SOME gun manufacturers.
5.56 is considered a military chamber. So some countries.... like the USA don't like to have their "Military" style rifles leave the country where they might be used against them. SO, some people stamp their rifles 223 to get around that export issue. This muddies the waters cause now you don't know if you have a 556 or a 223.
Click to expand...

yeah read something about that, just can't be sure without the reply of oberland arms directly.
 
Runningfool said:
The other thing to consider is whether or not your Norinco ammo really is 556 and not 223. I've gone through many crates of the stuff and some of the crates were labeled 556 but contained boxes labeled 223???? The good news is, if you don't feel safe shooting that ammo, you'll have no trouble selling it. This very thread will probably generate a few low-ball offers to take that dangerous norc ammo off your hands ;)
Click to expand...

haven't had any message for that. had so much trouble getting my hands on this ammo I might end up just swapping my barrel so it can chamber 5.56
I don't want a .223 rifle, I want 5.56 or a wylde .223 at least.
 
I shoot 5.56 in my .223 , mostly the Norc stuff , it shouldn't be a problem as long as the ammo is loaded to spec , it you have flattened primers or gas streaks on the primer , then the ammo is bad and shouldn't be used .

And for those of you who are a little preachy about how the rifle will go super nova on you if you use 5.56 in a .223 , Show me where you've seen this , because , aside from bad 5.56 ammo that would of blown up any rifle in 5.56 , I've never seen 5.56 ammo destroy a .223 rifle .
 
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