I recently acquired a SIG M17 (this will be the subject of a future thread) and, anticipating add a red dot sight some time in the future, a Safariland 6379RDS (6379RDS-4502-701) holster. I ordered this model directly from Safariland (SKU 1317516) after using their 'Holster Finder' feature to select a holster for the M17 with a RDS and Surefire X300U weapon mounted light. The holster packaging notes P320RX as opposed to M17, which perhaps suggests that the holster finder feature is mistaken (though I'm not sure why Safariland would have different models for the M17 and 320RX).
The holster will accept the M17, but the holster body can defeat the M17 manual safety. During dry fire drills I noticed that the safety would often disengage upon drawing.
Here is a close up of the holster with the safety engaged.
The ALS retention allows the pistol enough movement in the holster body that the safety can rub against the outboard holster body and disengage. This is a picture of the holster after some simple shaking. You can see the safety has enough room to rock back and disengage against the edge of the holster body.
If properly designed to accommodate the M17, the outboard holster body should cover and protect the safety to keep it engaged. Obviously the M17 with the safety disengaged has the same safety mechanisms as any other P320 without the manual safety, but of course this should not be happening. I've sent an email to Safariland detailing the issue. I'm curious if anyone has this holster/gun combination and can replicate this problem? I'm wondering if I just have a defective sample. Alternatively, is there a different Safariland model I should be considering?