any thoughts on DD big hole uppers?

AR/M4 AR General Discussion
1

Hi guys, new guy here.I have an old Colt big hole HBAR that I want to mount a flat top Daniel Defense on. I am in a banned state and I am stuck with this receiver. So question is, are the uppers good to go with respect to function?
thanks

2

I’ve only used one, but it was good to go on my Colt SP-1.

3

Should be just fine…