Mmm, are you talking rifle or pistol ???
Most ANY...dot sight will work at that range/distance.
I won't recommend a cheap sight, but the "
Holosun" line of sights work very well in most all situations. Sig Sauer is another good brand.
They (Holosun) have long battery life, they are tough against drop damage (MOST are not), some have a solar cells on them to work even if the battery is dead. Their brightness control is also better than most, Some are good with the brightness control, cheaper ones...are not.
Whatever you buy, DO NOT buy a sight with a dot size of over "
2moa". Anything larger will obstruct the target.
Here's a decent cheaper sight -
Shop Holosun Elite HE403B 2 MOA Micro Green Dot Sight | Up to 20% Off 4.5 Star Rating on 22 Reviews for Holosun Elite HE403B 2 MOA Micro Green Dot Sight Best Rated...
www.opticsplanet.com
A very good one for a rifle -
Shop Holosun AEMS Core Red Dot Sight | Up to 15% Off 5 Star Rating on 1 Review for Holosun AEMS Core Red Dot Sight New Product + Free Shipping over $49.
www.opticsplanet.com
Cheaper with solar cells -
Shop Holosun Elite 2 MOA Dot Night Vision Compatible Solar/Battery Green Dot Sight | 15% Off 4.6 Star Rating on 11 Reviews for Holosun Elite 2 MOA Dot Night Vision Compatible Solar/Battery Green...
www.opticsplanet.com
Good for rifle -
Shop Holosun HS510C 2 MOA Dot 65 MOA Circle Reflex Red Dot Sight | Up to 15% Off 4.6 Star Rating on 326 Reviews for Holosun HS510C 2 MOA Dot 65 MOA Circle...
www.opticsplanet.com
Mike