What about a set of "flip up" open sights, such as were found on a lot of AR15s back in the good old days. You can see over suppresor with them and they're extremely resilient against damage, no batteries to rely on. At 2-10m you only need a very short sight radius so just mount a longish rail on your rifle and mount the sights 6" apart and you're in business
These are the sights that came with my Sig516 (ah.. the memories..) they're all steel construction unlike the magpul etc equivalents, you can choose differentfront/rear combinations, V and blade, post and ring etc. I reckon they'd go good in your situation
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