Up for sale is a Holosun 407A3 red dot sight with a MP5-22 mount from HK Parts. I bought these a couple months ago for my Umarex MP5 but I wound up modifying the gun to fit an Infitech mount for a Holosun 503 instead. Also includes the factory Holosun mount, screws and tools as shown. $225 cash but may trade for loading components. Will meet in Middleburg or maybe Orange Park on week days.