Upper ???
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Old 12-22-2012, 10:01 PM   #1
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Default Upper ???

I bought a S&W M&P 15 in 5.56 and wanted to ask about what other uppers would fit on this gun? The reason for asking is that the 5.56 ammo is getting hard to find and is pricier than .223. If I would buy a less popular caliber that costs even a little more I will be able to find ammo more readily available.

I already have a M&P 15-22 so I don't need a .22. What is out there that won't make the ammo too much but more available?

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Old 12-23-2012, 01:20 AM   #2
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Lots of different caliber uppers will fit but in general, ammo wise, they all cost a lot more than .223, with the exception of 5.45x39. I'd stick with 5.56/.223.

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Old 12-23-2012, 01:27 AM   #3
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I'm finishing a build in 300 blackout. Ammo isn't much more than some .223/5.56 but it is slightly hard to find. I agree with Quentin on sticking with .223/5.56

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Old 12-23-2012, 02:42 AM   #4
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The 5.56 is proving hard to find this week. I like to put in a good stockpile of ammo for all the calibers I own. I bought 140 .223 on Friday at $7.75/20. The same brand in 5.56 would have been 11.95/20. Why the difference? How is the .223 going to shoot in the 5.56 chamber?

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Old 12-23-2012, 02:46 AM   #5
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Quote:
Originally Posted by aandabooks View Post
The 5.56 is proving hard to find this week. I like to put in a good stockpile of ammo for all the calibers I own. I bought 140 .223 on Friday at $7.75/20. The same brand in 5.56 would have been 11.95/20. Why the difference? How is the .223 going to shoot in the 5.56 chamber?
The .223 will shoot just fine out of a 5.56 chamber , basically the same cartridge just lesser pressure , I shoot .223 ammo out of all my 5.56 barrels and it works just fine
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Old 12-23-2012, 03:26 AM   #6
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The .223 will shoot just fine out of a 5.56 chamber , basically the same cartridge just lesser pressure , I shoot .223 ammo out of all my 5.56 barrels and it works just fine
So don't bother spending the extra money on 5.56? I had thought that the two were usually the same price. Gander did have a bunch of 5.56 but it was all tracer for $9.95/20.
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Old 12-23-2012, 04:41 AM   #7
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Don't buy the tracer, or at least be careful with it. It can start fires and no rifle should get a steady diet of it.

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