[problem]black lines in weapon

[TsIpIzTiK®]

i have these problem i have black lines in weapons

how i can delete these lines?

[CriticalError]

well you need configure shader in Unreal, I mean when put textures you have a option named "OutputBlending" and for default is OB_Normal, you need change that for OB_Masked, this option used when you have _ori and _sp textures have fun,