The file 'AR-15 Skeleton Grip 3D Printer Model' is (stl) file type, size is 1.3MB.
Update: Check the linked remix of the model if the detend hole for the selector doesn't line up. Thanks to forensic2000 for working on a solution and upload it for free again.
After I mentioned that the original file of that grip is no longer available on thingi, I use a modified (luckly realy bad modified, mesh inside mesh) file and deleted all added faces.
Propably this will fit to a MTW or GBB rifles, but I dont test that yet.
AR-15Skeleton.stl | 2.9MB |