Simple Fiber Optic Sights for Mossberg 500 reciever

[Monty_Python]

Hello. I have the basic Mossberg 500 20 gauge. I want fiber optic sights on it, but I don't want to install a rail on the top of the receiver. Are their Fiber Optic sights that will mount directly into the screw holes on the top of my receiver? I was Google-ing for about an hour and I just don't know enough about guns/sights in general for me to figure it out myself. Attached is the pic of receiver to confirm the screws I'm taking about... just generic/stock, straight out of the factory style.

Thanks for your time!
Monty

 

[rdm76mav88]

I havent seen any might have to install a weaver picatinny rail to tge receiver unless anotger member has a solution?

 

[Monty_Python]

I spent a few more hours on it with no luck. I either need the picatiiny, a dif barrel w/rail or a gunsmith it seems. I'll keep this in mind next time I buy, to get the sights/system installed at factory before purchase.

Thanks anyway!