Hmmmm, they missed a few of the design cues of the final "Portuguese / NATO" version of the original, but it's not a bad rendition of the earlier "Sudanese" variant. The proprietary receiver that takes DPMS-pattern components is the real question. Will the Brownell's receivers interchange with DPMS receivers? That is the real test to determine the classification of the Brownells' Retro rifle.
If the Brownells receivers do not interchange with the DPMS versions, then the next question will be if they fit the Original AR10 rifles. I would love to breathe new life into this old girl with a new Brownells lower receiver.....