Help with screw removal!

[u/A-U-Ahmed]

Update

I drilled those screws out, 3 of them came out easily enough that I think I did not mess up the threads. I only botched 1. I am sure 3 screws and some locktight mixed with hope will hold the rail in place

Just got myself a Mossberg 590 Shockwave. Want to mount a laser/red dot on top of the receiver but not sure what type of screw these are. Internet says they should be flathead but they are clearly not. Can someone help with some tips please?

[u/iNeedAdivorce]

Those absolutely look damaged to me. I'd engage the person I bought it from right away.