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not as it comes from the factory you would need to replace the upper assy with a 556/223 upper

Elijah, only with a 5.56/.223 upper Sir. This rifle has a 300BLK upper and will only fir 300Blk ammunition. You can change the upper for whatever caliber you wish to use. Stay safe and Cheers!

Hello there sweets! Our have to make some changes to the rifle before you can. 556/223 are different from 300 and the rifle needs different parts. Happy shootin!