this a special model that can mount a light and a 45degree backup iron sight
there are 2x M4 30mm long bolts needed to lock the mount in place but you can also use 2 nuts if you like but for me it works fine with out that.
it works with surefire type of pressure paths.
the movie link can be found here.
https://odysee.com/@UntangleWORKS:a/FGC6FA-outerbarrel:f
https://odysee.com/@UntangleWORKS:a/UNW-Lightmount:3
https://www.youtube.com/watch?v=DQjT527s\_nU
The author marked this model as their own original creation. Imported from Thingiverse.