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Old October 20, 2019, 03:19 PM   #1
Senior Member
Join Date: January 27, 2010
Location: AR
Posts: 1,401
5.56 upper to 6.8/224 Valkyrie?

I bought a 224 Valkyrie barrel and would like to build an upper. I have a complete built upper ready but it for a 5.56. Can I use the 5.56 upper for my build? I know the bolts are different between the 6.8/224 and the 5.56, Thanks
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