It is safe to assume that any flat-top AR, regardless of make & model, will need High rings. Maybe high rings and riser blocks.
The problem isn't getting a scope low enough on an AR-15.
It is getting it high enough to see through it without scrunching down on the stock so hard your jaw hurts.
Imagine, the scope cross-hairs need to end up where the iron sights used to be. Which is about 2 1/2" above the bore line.
rc