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This would be quite large for a handgun not to mention it mounts to a rail which would not be convenient to mount with a milled slide. From Truglo the Tru-tec micro is a lot closer to an RMR-sized sight for a handgun, unfortunately it is more expensive: https://www.budsgunshop.com/catalog/product_info.php/products_id/711020569/tgi+trutec+rd+dot+micro+blk

sorry it will not fit or work there is no top rail on the sig to mount this red dot and if you were somehow able to get it mounted on the slide the weigh may interfere with the slide operation resulting in failure to feeds and extracts (cycle)

Jack. no Sir. This connection type will be a Picatinny or Weaver Rail type and not the Optics Plate of a handgun.