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Old October 20, 2019, 07:05 PM   #4
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Join Date: December 10, 2012
Posts: 5,135
Originally Posted by chiefr View Post
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
Yep. Bolt face and mag are different.
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