I'd like to build a workbench (24"x48") to use for my own AR builds, firearm cleaning and general other stuff in my garage.  What are some of the must have items for your workbench?  If anyone could post pics of your set ups that would be great as well.  Thanks in advance.

Aside from all the common stuff, Build it a bit longer and deeper than you think.
Lower shelves for storing tool boxes and cleaning kits.
Back wall behind bench would be peg board.
On it, a good screw driver set, mini bits, punches, wheeler fat (in LBS torq) driver, Armor's wrench, any other specialized tools for the various guns you own, various cleaners and lubes.
A vice is really handy.

I like too put two power strips on any of my benches, one way at the back/wall for things sitting on the bench that don't move far and one on the front  of bench under the top facing fwd for drills, grinders, polishers, any hand tools or meters that might move around and the cords get caught and knock shit over on the bench.
An hardline airline just under the front power with a few air jack couplers to hook up any air tools you may want to use at said bench.
A good light overhead and possibly a PC or laptop to look at youtubes and ARF while working on projects.
I also put a black 5 shelf utility shelf on one end of mine for reloading books and other books, manuals and things related to guns. I store my power and projectiles on the same shelf in small to medium totes with large Moisture absorbers in them. On the other and if my bench, kinda around the corner from it, I have a 2nd utility shelf that has hard and soft gun cases, some rolls of paper targets and a few paper holders and corrugated plastic sheets to tack targets too.

42" tall, doubled up 3/4" and glued subfloor, some shelves, heavy casters, big ass vice and whatever else you'd want in a moveable table. I haven't had one in a fair bit after having about 80lf of dedicated bench in the shop, but something like that may work.

Outlets, can't have enough outlets.

Leave at least a 4" overhang on the top and at least one side for reloading equipment C clamps. It helps later.

Better yet, do an in-laid T-track and use the inline fabrication mounts.  Allows you to have a completely clean top or any combination of vices, presses, etc.










Notice in the last 2 pictures I built and 8ft and 6ft.  The 6ft I built the lower shelf high enough to fit ammo cans under and mitered the corners.  On the longer one you can see the Dillion press at the end.  This is by far the versatile setup.  I never anchored them to the wall of the shop since the inline fab mounts don't cause the bench to shake.

I used the 2x4 Basics kit years ago for two different benches. One as my main bench which is 8ft long, and one for my small milling machine and accessories. Both are holding strong many years later and (at the time) cost under $250 each to build. Look through the customer photos on the Amazon page below to get idea of the different configurations.

https://www.amazon.com/dp/B0030T1BRE?tag=arfcom00-20

That is what I used at home, it works good.

At work we make 30ft long workbenches we cut lumber and trim on and press all the joints with our truss press and 2x4 plates. You can set a full bundles of lumber on them and they don’t bend.

Oh WOW!  I would have never thought about the "T track"  those could be super handy  thanks for sharing that