Love these things
I bought one of these a few months back and paired it with a Palmetto lower on a 6 Creedmoor. This is a tall upper and Palmetto makes short lowers, a tall upper works fine with a short lower, you just have to get a tall handguard. I saw they're on sale so I bought another to pair with an Aero (tall) lower, I don't even have a project for this set but I couldn't pass it up!! lol

