One solution has been to use light-bearing holsters that index on the light and thus accommodate a wide variety of pistols.
The FN 510 is actually too big for the Bawidamann Gotham, which will swallow a P220 or Brigadier-slide Spaghetta with ease.
It works in the original PHLster Floodlight with the shock cord set at its loosest. We're fixin' to give it a whirl in the Floodlight 2.
FN 510 Tactical with Holosun 508 & Surefire X300U |