Soldier Systems Daily is covering EnforceTac and H&K revealed their optics ready version of the VP9/SFP9
http://soldiersystems.net/2019/03/06/enforce-tac-19-hk-sfp9-or-sd/
SD designation is for suppressors and OR is for optics. From casual observation, it seems like the dovetail for rear sight is different and the plate for Delta Point is part of rear sight.
From: Soldier Systems Daily
