Summary

I created this weapon lock for my combat robot.
Its a scalar kit from Repeat Robotics
https://repeat-robotics.com/product-category/scalar-robot-kit/

It has magnets on the bottom that stick to the weapon blade. Just slide it in the front and you are done.
No clamps.
Magnets I used from Amazon
https://www.amazon.com/gp/product/B07CNBSMDZ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

Printer settings not an issue. Think I printed 5-10 percent infill. No supports needed. Print with magnet holes facing up.
I included the Gcode file I used on my Ender3