I’ve bee ordering so many things from various online stores, I honestly forgot I ordered these over a month ago. I purchased them from the “Professional Tactical Appliance Store” on AliExpress
QD Offset Mount: https://s.click.aliexpress.com/e/_dUubppp
I did a quick install and found that the 5-position mount worked as advertised, allowing you to select 5 different angles to configure your taclight on your Picatinny rail. But the mounting foot on the Pic-rail was small (only about 1/2″) so it doesn’t provide a secure enough clamp. The material is polymer and tightened down, there was still wiggle. Acceptable for general airsoft use but the recoil from real firearms will likely loosen this. And the polymer clamp is likely not strong enough for action shooting or real-world durability.
The mounting tube for the taclight itself was a bit wide, requiring a taclight with a minimum of a 2.75″ battery tube to clear it. Shorter tacklights may require you to completely extract the taclight from the mount to access your battery or a clicky tail.
The QR (Quick Removal?) mount on the otherhand felt more robust. When mounted, there was no flex or wiggle. The mount is secured by the tension of the tight tolerance of the molding along your, secured with a cross-bar which is retracted when you press a button near the base. The mount is also almost completely polymer, so repeated removal may wear down a tight groove and loosen it over time?
I also found my particular placement on the bottom rail of my handguard problematic because my palm would press the QR button when I held my rifle in a C-clamp. Mounting it on a different position may fix that problem but your setup may vary. Apart from the C-clamp issue, I found the mount to be robust enough for use on high-recoil firearms.