Or, if you get some Hogue rubber grip panels - you don't need those washers. They are only used on the factory polymer grips
I found on my 92FS, that if you install the Hogue wraparound grips, don't use the washers, and screw the factory grip screws down really tight, they can make contact with the magazine, put scrape marks on it, and not allow it to drop free. So right now I'm running the Hogues with the washers and factory screws, and the screw heads stick up from the grip a millimeter or 2.
Congratulations on the Beretta 96 purchase. My dad has one of the first ones made back in the very early 90's, and it's been 100% flawless for almost 20 years, with no changes in springs or parts. A well-cared for Beretta will run reliably for decades. My next handgun purchase will probably be a Beretta 96A1, as I like the integrated rail and recoil buffer.
Oh, and another thumbs-up for Mecgar Beretta magazines. I have their 18 and 20-rounders for my 92. Flawless and well made.
And one more thing - The best thing you can do to a factory Beretta 92/96 is the "D" spring conversion. It is an easily found part, very inexpensive, quick and easy to install, and will lighten your double action trigger pull by a few pounds, to at least make shooting double action
possible.