I believe I see the source of the error, it should be fixed in the next minor bugfix update. For some reason certain modded weapons are skipping past the step where they should have some vital stats assigned.
Its all ok now, Armor Config mod had wrong ID's for 2 rigs and made one like rail for some gun and 5.56 ammo) i edited it with proper values and all works fine now)
P.S. Thx for helping with ammo settings, i used 0, 0 and have different PMC with many types of ammo now. I have more LIVE wibes now)