As I recall, the US Military felt the lightest weight a trigger pull should be, on a 1911, to pass inspection, was 5.5-6.5 pounds.
That’s on a gun with a manual thumb safety and a grip safety.
The military is an admirable institution with many fine and valid ideas. Some are simply not "optimal" for civilians.
The military also required the gun to be carried holstered, in condition 3. Chamber EMPTY, hammer down....a fine, and safe method of carry, particularly when you are looking at carry by literally thousands of young men who were not well trained pistol users.
I was in the military when the 1911-A1 was still being issued and I can tell you that there were valid reasons to replace the 1911 when they did, but I have always questioned replacing a .45 ACP service pistol with a 9mm alternative.
I was also in the military (Army) when the 1911A1 was the standard service pistol, as a Small Arms Repairman in the 70s. I handled and instpected a lot of 1911A1s and even a few 1911s that were still in service. Some of those guns had spent virtually their entire service lives in arms rooms, and some had "been through the wars"...but every one was serviceable, by the official GI standards.
Of the thousands of 45 pistols within my areas of responsibility, only 3 ever came to my shop for repair, and all 3 of them were due to user caused damage.
The reason the US military replaced the .45 when they did (mid 80s) was because the very newest 1911A1s in the inventory were purchased in 1945. While they were still serviceable, all were old, and a great many of them were worn and sloppy due to generations of GIs taking them apart and putting them back together, racking slides, dry firing and other wise generally playing with them, OUTSIDE of actual use in combat.
Replacing the .45 with the 9mm was the result of a political deal, from the late 1950s. At the time, we were pushing to have our new rifle round (7.62x51) adopted by NATO. In exchange for NATO adopting our rifle round as standard, we agreed that we would adopt their pistol round (9mm Luger) as our standard, when we replaced our .45s. The Europeans got a bit put out when we didn't replace our 45s within a few years as they expected us to do, but we did keep our word, and when we finally did replace our .45s, the replacement pistol was a 9mm.
I'm not a Glock fan, quite the opposite, but I have shot them, and found the trigger "slap" against my finger to be uncomfortable.
I have no suggestions about modifications to the GLock, other than to replace it with a different pistol, if possible. Just my opinion, lots of people feel otherwise.