The safety snaps on the holsters are directional to keep them from ever coming undone accidentally. They can be a little tricky, especially when new. They do loosen up, so work them a few times. if necessary, use a screw driver to pry on the tab end at first. Make sure you watch the "Snap Tutorial" video.
PLEASE WATCH THESE VIDEOS!
There are handy tips and hints in here that will help make it easier for you to get your Flashbang ready to use.
Snap Tutorial - Flashbang Snaps are Directional!
High Carry vs Low Carry
How to Safely Re-Holster the Flashbang
Flashbang Holster Tips & Tricks
If You Think You May Have Received the Wrong Draw Flashbang Holster, Here Are a Few Things To Check
Most important:the "dimpled" part of the holster is at the muzzle end of the gun!