Cappy

I went to the Noreen Arms website but they're out of stock. I guess I will wait until they're back in stock. I was thinking about trying to find a good deal on a used complete upper assembly. So... I was wondering if any body else on this forum has used a different branded complete upper on a Noreen Arms lower, with good success.

Looking to find out what brand complete upper is best to pair with the complete lower I just purchased. Any help would be appreciated. This is my first stab at an AR-10. Thx much!