It seems like everyone and their mom makes a piston-driven AR-15 these days. And with good reason.
Piston-driven guns run cleaner and cooler than a standard direct impingement (DI) system, making them a big draw for high volume shooters such as those who shoot competitively like in 3-Gun.
They also just make all around great guns if you want to get into AR-15’s a bit more and try something different.
Who knows? You might just fall in love.