6mm arc Ar15 build for predators

Trying to get some ideas for some high end/high quality gun parts to build a 6mm Arc ar15.
I found some online built already, but anyone can buy one of those. I want to build one that will be harder to replicate.

Upper/lower
Barrel
Gas block and tube
Bolt carrier
Charging handle
Grip
Hand guard
Butt Stock
Buffer tube and spring
Trigger
Already have an optic and suppressor. Just need to get some ideas of the other things. At least more than what I can find. There’s so much out there nowadays that I’m sure I’m bypassing over some great products. Thanks everyone

I bought an Aero Precision 6 mm Arc configuration and it is awesome to shoot and extremely accurate.

It came with mid length barrel gas block and a heavier 20" barrel with pretty decent furniture.

I have not used it for hunting so cannot attest to how well it will take down animals.

I can attest to its ability to shoot well. And highly recommend it for an AR15 platform.

Cheers