21mm Picatinny Laser/Flashlight mount was has a Ø19mm pipe (Ø19,2-Ø18,80)
What you need:
-2pcs M3x10 screw and 2Pcs M3 nut
-1pcs M4x30 screw and 1pcs M4 nut
Print from PETG, 4wall, 5-5top button, 20-40% infill
The author marked this model as their own original creation.