Is it for either a 17HMR or .22 WMR rifle because if not it won't work, they're calibre specific
Personally I don't like the basic Hawke mil dot/half mil dot ret, I do like their 10X half mil dot with the box on each arm of the cross, & the AMX.
The best I've used is the Optisan Mil F1MH16.
Decide if you want mil dots & MOA or Mil & MRAD adjustment & go from there.