Congratulation on your TX , I would tend to think in terms of 1" tube, look for something not too heavy , I have a MTC Viper on my Field target HW97 and it is great and heavy, but for field walking I think the MTC Mamba Lite, or Hawke Varmint 3-12 with 1/2 mildots, (I own both, plus a TX) keeps the gun in balance and will help with your accuracy. Enjoy.