You're welcome...I found they were cheaper on optics planet .com. Just Google a discount code too. I went shooting this morning and did pretty good with the wide rear sight channel on the Spartan Operators. Ill probably keep them on.. Love that orange. Best of luck!Motosteveg and 2020Jeep, thanks so much for the info! From what I’ve gathered, the PDP will do best with a Gen 5 regular size 9mm sight system. I’ve ordered my Gen 5 Ameriglos to replace my new XS sights.