Please note: you need to download GTA V Weapon Data which made by fkngoob due to ancient data corrupt my gameplay
Also after replace weapon.dat, you need to replace default.ide to avoid game crash due to game cannot understand what animation supposed to that weapon.

Copy and paste this lines in weapon.dat made by fkngoob:
$ MP5 INSTANT_HIT 900 900 353 -1 4 uzi 71 30 0.51 -0.01 0.2 0 0 3.0 1.5 6 8 6 6 8 6 30 7001
$ MP5 INSTANT_HIT 900 900 353 -1 4 uzi 71 30 0.51 -0.01 0.2 1 250 3.0 1.5 6 8 6 6 8 6 30 7011
$ MP5 INSTANT_HIT 900 900 353 -1 4 uzi 71 30 0.51 -0.01 0.2 2 999 3.0 1.5 6 8 6 6 8 6 30 7031

Attention: if you are use for mission that enemies use MP5 (especially Home Coming, Beat Down on B Dup and Grove 4 Life), you need unmodified stats on that weapons,
if yes, rename from .dat to .txt, then copy and paste backup stats:

$ MP5 INSTANT_HIT 35 40 353 -1 4 uzi 30 25 0.51 -0.01 0.2 0 0 0.75 1.1 6 9 7 6 9 6 30 7001
$ MP5 INSTANT_HIT 40 45 353 -1 4 uzi 30 25 0.51 -0.01 0.2 1 250 1.0 1.3 6 9 7 6 9 6 30 7011
$ MP5 INSTANT_HIT 45 45 353 -1 4 uzi 30 25 0.51 -0.01 0.2 2 999 1.2 1.5 6 9 7 6 9 6 30 7031

After that, you must rename .txt to .dat, which a thing that I forget mention to this flaw from previous mods.
I recommend use God Mode mods for CLEO from gtagarage, use for kill aggressive drivers from cheat with infinite ammo and never wanted for more fun.
But don't play with this (I mean aggressive drivers from cheat) over 40 minutes, it cause a problems.