Questionable gun & ammo specs

[Reticuli 14]

Not as interested in more guns as ammo, but def interested in improved gun specs. ACE doesn't seem to change gun specs, just add different ammos and changes how the ballistics is performed, right? Nice, but why 7.62 Sig 556 exists with longer barrel than real Sig 556 if HK 417A2 is heavier and does the same thing? Also, Intervention vs the Lynx -- out to 800m when using ACE but not a ballistics computer or range chart, they are both accurate enough, but the Lynx is way harder hitting for obvious reasons. If no plans on shots past 800m, then zero reason to bring M200. In real life, the Lynx is much less accurate unless using match grade ammo and has much shorter useable range than the Intervention that you would have difficulty hitting anything besides a big truck out much farther with this ammo. Specs are not only bogus but make no sense even for balance & trade-offs, both in fantasy & deciding which guns to include. Worse, some guns in Arma 3 never have utility compared to certain others.  So, anyone know of mods that change just the vanilla guns so ACE can do better things with them, including for the AI baddies?  At least slightly more ACE-compatible ammo, too, would be icing on the cake.