KISS, it is!
Mine was pretty cheap. Some surplus heavy welding rod, a couple appropriate bends in it for trigger on one end, and weights on other.
Took some scrap lead and poured slotted wafers of various (scaled) weights to hang on the rod's lower end to make various increments from 2 to 17 lbs. Not that I need to go to 17- just that I have that many wafers in total weight. And yes, I did once find a rifle that didn't trip the 17!
It is likely the world's bulkiest trigger gauge.....
. Been working fine for 30 plus years.
Stamped the appropriate weights on wafers and clear-coated with several coats of varnish for contamination protection.
Maybe not dead on- accurate, but good within an ounce or so.
I'd recommend a "real" one, tho.
