Purchased to use on my m&p fpc - Patriot Optics Double Tap 1x30mm 2 MOA Red/Green Dot Sight

The item comes very securely packaged, which was impressive. The optic is very nicely constructed and easy to operate. The mounting knob is a bit large and poses a mounting location issue where it interferes with the body of the FPC when folded if mounted too far back on the rail. I do intend to add a multiplier that should eliminate this issue. Also, making the knob so it could be switched to the other side would also correct the interference issue. Or one could add a smaller nut or wing nut to replace the knob. The flip up caps work well and hold the caps up and away from the optics securely. All in all, it's a great 1X optic that I am sure I'll enjoy for years on my FPC.