The Beretta 92 is one of the finest shooting guns that is often overlooked in this modern age of polymer striker wonder nines. Whether you have the M9A3, 92 Brigadier, or went full bore with an 92G LTT Elite you can make the Beretta into your favorite shooting gun without a lot of effort. The categories for upgrading are magazines (yes - it matters), Trigger, sights, and grips. I shot the 92 Elite LTT RDO since it came out in 2020 through Carry Optics Nationals in USPSA - they're absolutely great guns and their unique design I would argue they may be one of the best service weapons invented.
The first - and easiest - area to upgrade is your magazines. Depending on which model you got - there's a good chance you got the 15 rounders from Beretta. It's kind of a shame that the guns are so large but hold so few rounds. MecGar saves the day with their 18 round magazines. You can buy magazines anywhere and they are pretty economical around $30 apiece - but if you're buying several - it might make sense to join Big Daddy Unlimited as MecGar is one of the brands that there is a steep discount. The MecGar 18 rounders are antifriction coated - the magazines are so good that the Langdon Tactical models ONLY ship with 18 round MecGars - they don't even fool around with the OEM Beretta magazines. So with that handled you gained 3 rounds in the gun and super reliable magazines.
Trigger is going to be a bit different - thankfully you have a one stop shop depending on how nuts you care to go. Since the Beretta is easy(ish) to work on you can do it yourself or simply send it to Langdon Tactical or Wilson Combat. I've handled guns worked on by both shops - the triggers on the Langdon guns are appreciably nicer. Like any hammer fired gun - it's done in degrees.
The single biggest impact you can make to the double action pull weight is going to be through swapping out the hammer spring. Langdon Tactical offers a Chrome Silicone spring - which has an absurdly long life. They're pretty cheap and can be bought directly from Langdon Tactical here. The 12# or 13# will be sufficient. Use a 13 if you shoot import ammo with hard primers a lot - the 12 will light off anything domestic. While you're in there you might as well also do the Trigger Spring. At this point you'll have dropped your double action pull significantly - probably from 12 pounds to a much more manageable 7-8 pounds.
If you care to refine the trigger further - the Langdon Tactical Optimized Trigger bar is essential - it makes the trigger reset very short and very clean. It's well worth it's cost. NP3 looks cool but isn't strictly necessary.
The final - if you need to go hog wild and not piece it together is the match hammer. The hammer is gunsmith fit - so either you or your gunsmith will need to be skilled in Berettas. This will remove some of the slack in the trigger in Single Action - which is a nice feature to have if you're doing speed shooting - like competition.
If the trigger reach isn't your cup of tea in double action - you can swap the trigger for a Wilson Combat short reach trigger. If you have a plastic trigger you can upgrade to a standard steel trigger - but it's not a crazy difference.
Depending on the model of Beretta you got - you may be able to drift out the sights - or your may be stuck with the cast-in front sight on the 92. If you have a plain jane 92FS - then you can (or get a gunsmith to) drill the front sight for a fiber optic pipe. The rear sight can be upgraded to somethign less buys like the Wilson Combat Battlesight. If you are fortunate enough to have the dovetail sight set up then Wilson Combat makes a fiber optic front sight for their Battlesight rear.
For grips - you really need some good ones - my favorite grips for the Beretta - and I've tried a bunch of them at this point - are LOK Veloce pattern grips. They are hands down the best pattern. They're more comfortable at the rear of the grip due to the pattern there, but have the golfball style pattern at the front where your fingers wrap around and land. They absolutely plant the gun in your hand. They're available in a bunch of different colors - and they are highly functional. They are not too aggressive to carry with them (they're easier to carry with than the Full Checkered texture) .
With that - your Beretta will be the envy of everyone on the range. Enjoy!