Keep in mind that after 10 years - and you're at 30 - she's going to get not only half of everything, but permanent alimony.
Which of your doubles are you willing to give up?
They'll have to be sold because she doesn't like them. And the valuation - will it be at the prices you paid, or the prices you told her you paid? (Hint: a good lawyer-accountant team will suss out the actual price you paid, but only credit you with the price you told her you paid.)
Find her a nice, high-end 870 or, as suggested above, a customized Model 37, and make up. And when you take her shooting targets, make sure you miss one more than she does.
Be glad she isn't like the dental tech who worked on me today, whose contempt for her ex's liking hunting and fishing was barely concealed but patent just from the tone of her voice.
