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Old June 21st, 2017, 11:41 AM   #1
Catnip 0_o
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Default .223 & 5.56 Question

I'm looking at purchasing my first AR platform and was wondering what the difference is between the .223 and the 5.56 round? I've heard both rounds are interchangeable in some rifles and others will only accommodate one or the other.

I'm looking into purchasing this rifle:
http://www.cabelas.com/product/Smith...es/2231083.uts

I would assume it can use either the .223 or 5.56 NATO round safely as it states both rounds in the description section under caliber?

Thanks
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Old June 21st, 2017, 12:00 PM   #2
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Yes, in most cases with AR's they're interchangeable. If I remember right the case on the 5.56 is a tiny bit larger but most AR platforms are designed to use either.

If you're interested I'm getting ready to sell my Rock River Arms AR15 with a bunch of upgrades, accessories, case, ammo, bunch of mags, etc. Send me a PM if you want more info.
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Old June 21st, 2017, 12:14 PM   #3
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Quote:
Originally Posted by Catnip 0_o View Post
I'm looking at purchasing my first AR platform and was wondering what the difference is between the .223 and the 5.56 round? I've heard both rounds are interchangeable in some rifles and others will only accommodate one or the other.

I'm looking into purchasing this rifle:
http://www.cabelas.com/product/Smith...es/2231083.uts

I would assume it can use either the .223 or 5.56 NATO round safely as it states both rounds in the description section under caliber?

Thanks
The main difference is the casing. Many articles published on the main differences in .223 and 5.56.
3 things to consider-1. be sure the AR you purchase is compatible with both, or if only designed for .223, never fire 5.56 through it. 2. Availability. I can find .223 ammo all day, but 5.56 ammo can be a challenge to find sometimes on my side of the state. 3. sharing ammo with buddies can be cumbersome if you are running .223 only, especially if they were able to find 5.56 and I couldn't (see #2)

Here's an article (from a reputable source) that explains the main difference:
https://bearingarms.com/bob-o/2011/0...ould-hurt-you/
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Old June 21st, 2017, 01:37 PM   #4
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Quote:
Originally Posted by Catnip 0_o View Post
I'm looking at purchasing my first AR platform and was wondering what the difference is between the .223 and the 5.56 round? I've heard both rounds are interchangeable in some rifles and others will only accommodate one or the other.

I'm looking into purchasing this rifle:
http://www.cabelas.com/product/Smith...es/2231083.uts

I would assume it can use either the .223 or 5.56 NATO round safely as it states both rounds in the description section under caliber?

Thanks
I have that rifle, it's rated for both .223 and 5.56
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Old June 21st, 2017, 09:16 PM   #5
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Thanks for all the informative input guys
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Old June 22nd, 2017, 03:43 PM   #6
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5.56-rated firearm will shoot both. .223-only rated firearm hasn't been proofed with 5.56 ammunition. Most will say "multi-cal" stamped into it and I'd go after one of those. There is the Wylde chamber also, but that's getting a bit out there.

M&P Sport II can sometimes be found for $550 from Dunham's.

DPMS has several comparable 5.56 rifles that are significantly cheaper, especially since there is a $75 rebate on the cheapos and $150 rebate on the slightly less cheapos. They are no Daniel Defense for sure, but neither is the Sport II. https://dpms.rebateaccess.com/

Unless you have Cabelas bucks burning a hole in your pocket I'd go shop around, especially at the lower end of the 5.56 spectrum as they are practically giving them away. Especially if you have a Gander Mountain close by as a lot of the MAP equipment is cheaper right now than you can get anywhere else. 15% on hand guns and 20% on long guns right now. So if you're looking for something that has MAP rules, like Sig, it's worth taking a look at Gander Mountain.
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