Diana 54 AirKing

This swfa 10x going on 5 years and a ton of shots. No worry if it break. No questions asked .
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Two thoughts. I use a Hawke Sidewinder 6-24x56 on my 56 (same rifle different stock) and have shot several thousand pellets with it and no issues. Recently, I had Tom at Vortek make a special kit for me,tuning it down to 15.5 ft lbs. it is a dream to shoot with absolutely no noticeable recoil, easy to cock, and shoots one hole groups at 20 yards and 3/4” groups or less at 50 yards. Absolutely no issue for a good scope the way it shoots now.
 
Put a tune kit in it. That will knock out a lot of what kills scopes. If it were me I would us a Sportsmatch Dampa mount over the Diana Bullseye, which I am not a fan of. I have always tuned my 54's and never turned the power down. Just use good mounts and good scopes. Bushnell Elites used to be the way to go, but these days the mark is flooded and a lot of them are overpriced for what you get. If it were mine I would assume a Hawke Airmax FFP can survive. If it breaks, send it back and they will give you another one