Modified versions of some files from the below TFA blaster to make it more accurate to a TLJ blaster. This applied to the standard version, not the heavy or Phasma variants.
https://www.whitearmor.net/forum/topic/45171-first-order-f-11ds-the-force-awakens/
Research thread is here: https://www.whitearmor.net/forum/topic/43034-tlj-f-11d-photos/
Changes
You will need 2 M3 bolts/screws to to first attach the mount to the blaster. You will want to pre drill your blaster for these.
You will also need 2 M4x12mm black countersink machine screws to then join the rail to the mount.
This should be accurate to NATO specs and be able to mount the accessory light but I am yet to test it.
MODS.zip
This contains a small number of files that have further mods from the above to aid with fitting switches and wiring etc for electronics. This includes extra hollowing, holes for wiring, mounting screw points and in the magazine mount space for a slide switch in about the same place as the screen used items.
There is a hole in Barrel Rear 2 - MOD.3mf which is for a micro switch, to be actuated by the custom trigger also included. The two holes in the side are for grub screws that to secure this.
These are very much aimed at my own personal build but may be of use to some.
The author hasn't provided the model origin yet.