Brownells actually put out a decent piston AR recently. I could never FOR di over piston in good faith.
https://m.youtube.com/watch?v=wAHaF1jPxSc
Technically, that’s an AR-18 upper that will accept AR-15 lowers. I’ve seen it and am interested in getting one; my problem is that I’ve seen *so* many DI guns jam or have problems at the range due to the DI system in the last 40 years that I cannot trust the system. It only gets worse if you fire suppressed with all the crap blowing back in your face. I’ll stick with piston guns.
Their AR upper assembly that's a modern take on the AR-180 has been getting rave reviews.