The Diameter of the flashlight have to be around 1"
The FAB Defense Tactical Grip & 1in. Flashlight Adapter w/ Activation Trigger fits any flashlight with a 1" diameter body. I would recommend something like the Streamlight Strion LED HL Flashlight, which features a rechargeable battery with up to 500 lumens and up to 50,000 hours of battery life on a single charge.
https://www.opticsplanet.com/streamlight-strion-led-hl-flashlight.html
We do not currently carry this FAB Defense Tactical Grip & 1in. Flashlight Adapter in FDE.
? I dont understand the question
Unfortunately, there are a few lights that simply will not fit properly.
This is compatible with flashlights with a 1" body. That could be anything from Surefire or Streamlight to Nitecore, InForce, Elzetta, or even Maglight. It's not a matter of one light working best, but it comes down to being compatible with your needs as a user, and honestly, the budget you're working with.
You will need approximately 4.5-5" rail section to have the hole rail mount used.