Please please please, when asking about a specific product, give us a direct link to that specific product. Nobody wants to waist 20 minutes combing through similar products in the hopes of landing on the right one.
I have a A4 clone that I'm working on as well. That isn't compatible since the barrel is govt profile if you look at the barrel towards the front sight base. If you want I could put the links to what my build consists of.
Haven’t seen a MD-legal A4 clone for sale. Probably something you’d have to build.
I like the idea of the Colt AR15A4 factory rifles, but they’re Government profile. I’d like to get one of those lowers; I’ve seen a few parted out on Gunbroker.