I haven’t shot a pistol with rds but I don’t think I would want co witness
I shot my buddies Glock 45 with Holosun 507c and suppressor height sights on multiple range sessions. I didn't like the co-witness setup at all. I had Allen Moore mill my glock 17 and removed the rear dovetail. I removed the front sight myself. This setup works great for me. To each his /her own.