The only O/Us that seem me well from the factory, are the older Citori Skeet models, the XS Skeet, and some Citori field models like the 525 and 625. The 725s do not have enough drop at comb for me, unless they have an adjustable comb. No Beretta that I have shouldered fits me properly. My K-20 required an adjustable comb to get enough drop at comb, and even with an adjustable comb, I had to remove 3/16" from the comb on my F-3. Now if you are willing to mod the stock, you can make most O/U shotguns fit, but some people are not willing to start modifying a nicely finished stock.