My apologies for not answering on point to the Hawke, but look at the Bushnell TRS-25, with a 3 MOA dot and 11 brightness settings. It mounts onto a single cross slot of a Picatinny, Weaver, or Warne type rail or base. And it can be had with a riser to put it about 1 inch higher, for high comb rifles. It can be found for about $55.00 USD on sale, typically at $99.00.
For a bit more money, Bushnell First Strike is a lot like the Burris and Zeiss sights, which fit onto the AR-15, shotguns and some handguns, like the FNH 45. Looking at the FNH will give you an idea of the scale. It has a 5 MOA dot.
The Burris FastFire must be pretty rugged, as many of them are used on .45 ACP race guns, mounted on the slide, as well as on AR-15s, on 12 gauge shotguns.