Can anyone explain? (Borderlands 2)

Recently played matchmaking thrown to the player, which gave me about a weapon that is represented in the picture
Of course I have a question, what it is and how to get it. As he explained to me, this is a weapon added community patch'eat and cheat a little ON ("Gibbed Save Editor Borderlands 2"; "BLCMM" and "Borderlands 2 Cheat Compilation By TECNOJACKER" in conjunction with "CHEAT ENGINE 6.4")
Did not understand how to set to achieve the result presented in the image