I wanted to give you a look at how the Streamlight Sidewinder Stalk light mounts to an Ops-Core ARC Rail using the High Offset ARC Mount.
The issue is that when you mount the light directly to the ARC Rail, you don’t have room for the AMP headset or other mounting adapters.
The High Offset ARC Mount relocated the light above the rail, offering plenty of room for your headset mount yet still making access to the convenient.