Reddit reviews 5.11 Tactical TDU1 3/4" Belt, M, Black
We found 1 Reddit comments about 5.11 Tactical TDU1 3/4" Belt, M, Black. Here are the top ones, ranked by their Reddit score.
Non-metallic, low profile plastic buckleHeavy duty 1.75" nylon webbingThree colorsSizes small to 3XL
So the buckle itself is actually just rebranded version of the Stubai Click Fix Xl #971605. Stubai doesn't do retail, but I was able to find the buckle for sale here (the pictures aren't exactly right, but the part number is.) I ordered one a few days ago.
There's also webbed nylon tactical belts all over amazon that could be used with this. Here's one with the correct width.