Picatinny rail problem

[slave601]

I bought a picatinny rail for my versa max. I have a eotech for it. Well I put the rail on there and 3 of the screws barely catch one is a lot longer. It catches just fine. I'm just wondering if they'll back out due to shooting 3 1/2 shells. I did put blue lock tite on them. I have a picatinny rail for my 870 with longer screws and it seats perfectly. But I've read where they are not compatible. I need some help or info guys! Thanks

[outdoors]

THEY , SCREWS , GO IN A CERTAN WAY I CAN'T REMEMBER ,I THINK THE LONGER ONE GOES IN THE REAR OF THE RECEIVER AND THE SHORTER ONE IS ON TOP OF THE RECEIVER

[slave601]

Ok I'll try that