Better than the acro for less - Steiner MPS Micro Red Dot Sight- 3.3 MOA Dot Fully Enclosed with 1x Magnification, Waterproof and Shockproof, ACRO Footprint, Heritage Warranty

This MPS has clearer glass and a sharper red dot then the Aimpoint Acro which costs 40% more. (I own both). A lot of people don’t give much thought to it, but I love the way optics like this and the acro and the 509T attach more like a rifle optic on a Picatinny rail. If you have your slide milled for direct mount, you will have precisely zero tiny screws threading into your slide or a plate.