Mossberg 500 ghost ring removal - HELP

[nexqunyx]

Howdy fellas! Need your help.....I'm installing a Mesa Tactical side saddle rail on my Mossberg 500. I'm attempting to remove the hex screws to remove the ghost ring sights- I have a mini set of metric and SAE allen keys handy but none of them work. Maybe I don't have the proper size in my set. I don't know.

Does anyone know the actual allen key size for these screws?

I've tried a #3, 4 (metric) key.....I also tried 3/32, 1/8 (SAE). They're either loose or just won't fit. Are these screws Torx type?
Any info would be appreciated fellas. Thanks
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This is the Mesa side saddle rail I'm installing

 

[nexqunyx]

Done!

Ok...let me reply to my own post........
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I went to Canadian Tire and bought a complete set of hex keys for under $10. Evidently I didn't have the right size.
It's all good! Got my saddle rail installed!
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[tetra]

Great conversation with yourself! lol

 

[Onagoth]

I probably have over 50 different sized Allen and torx keys....I collect them now for situations like this