Reviving this thread here. The Shadow target is listed under USPSA production specifically. Can anyone verify if this is now legal under IDPA SSP and thus ESP?
From the rulebook valid as of 03/01/2015...
SSP -
8.2.1.3.1 Sights may be changed to another notch and post type. Slides
may not be machined to accept different style sights.
ESP -
8.2.2.2.1 Sights may be changed to another notch and post type. Slides
may be machined to accept different style sights.
As IDescribe stated previously, the Shadow Target slide is milled to install the LPA style rear sight so I don't think it is legal for SSP but would be OK for ESP.