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Old 03-23-2012, 12:21 AM   #1
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Default .308 upper

Hey guys
I searched the web but couldn't get a confirmed answer. Will a .308 upper and mags fit on a 5.56 lower and function properly?
Tia

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Old 03-23-2012, 12:22 AM   #2
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no.

however if you have a colt 901 in 308 you CAN fit any 556/223 upper and it will work

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Old 03-23-2012, 12:46 AM   #3
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Nope, yer talkin' AR-15 vs AR-10.

Here's a visual;



Not only does it make a bigger hole, it needs a bigger hole. (Mag well)

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