This is how I run mine. Sandman S can, vortex LPVO, running on a 14.5" barrel 5.56, all around duty set up that I can do anything with and hit reliable groups with. In all honesty, if you're not running a suppressor, your standard AR will be much lighter and perform everything the standard...
That's a fair argument with the Jakl, it definitely has more weight than say my DDM4V7, even when both stripped down. I'm a bigger guy so I don't mind the extra weight, but it definitely is a factor in with it
I've had that 11.5" barrel and currently have the 14.5" pin and welded barrel and both have run like champs. 300blkout would be ideal for it as it's a great suppressor host, and I'd definitely recommend getting the upgraded charging handle for it if you decide to get one!
I enjoyed my vector tbh. Ik it's a bit of a dark horse but the recoil control, ergonomics, and reliability to me is what's really stood out to me. Glock compatibility, compact packaging, and the wow factor are definitely what caught my attention when I first got it, just wish they're accessories...