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Offline Sourdough

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Changing Uppers
« on: April 12, 2013, 04:17:45 PM »
Just bought a DPMS in 5.56/.223.  Two cartridges I am interested in that are AR-15 compatable I've heard.  6.5 Grindel and .338 nFederal.  My question if, can I order a complete upper in these calibers and put it on my DPMS, or will I need a different lower?
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Offline Oldshooter

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Re: Changing Uppers
« Reply #1 on: April 12, 2013, 06:19:53 PM »
From what I can tell, if your calibers are AR15 compatible, any upper in that caliber will fit your milspec lower.
 
Now I know when you get to 308 you are looking at a different lower.
 
If its AR15 compatible it is probably the same cartridge length as the 5.56 and based on that cartridge case.
 
I have both 556 and 308  and they are not interchangeable
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Offline Bigeasy

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Re: Changing Uppers
« Reply #2 on: April 12, 2013, 09:26:46 PM »
The 6.5 Grindel is AR-15 compatible.  The 338 Federal is based on the 308 Winchester, and an upper for that cartridge will require an AR-10 type lower.
 
Larry
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Offline Sourdough

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Re: Changing Uppers
« Reply #3 on: April 13, 2013, 04:59:03 AM »
Thanks Larry, that is what I was thinking.   Thanks for the info.  Rog
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A 'Veteran' -- whether active duty, discharged, retired, or reserve -- is someone who, at one point in his life, wrote a blank check made payable to 'The United States of America,' for an amount of 'up to, and including his life.' That is honor, and there are way too many people in this country today who no longer understand that fact.
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