Please help me find a m lock rail for this Mp5 that is compatable?!!!

https://preview.redd.it/cp1i4le7msye1.png?width=2448&format=png&auto=webp&s=341c29455a96c13c12a17d6bee3395385534ed80

This is the exact model I have and I can't find clear info on what kind of m lock rail would work on this. I have two I am looking at and am wondering will they fit?

https://preview.redd.it/fhn379temsye1.png?width=2486&format=png&auto=webp&s=4bd84a3a0c5697072d48927c3c3dbafeaf4944c1

https://preview.redd.it/p4marpjfmsye1.png?width=2474&format=png&auto=webp&s=997203ab0234ccbdfb606ae0f5687de78e6a61c4

Thank you!