I'm not in any shape or form handy, but I was able to remove my factory SCAR brake and install an AAC muzzle device. It's really quite simple.
All you need is a torque wrench and then it's just a matter of using shims (if timing is required) - it's seriously easy.
There are plenty of things I'd pay a gunsmith to do, but installing a new muzzle device is not one of them.
Trust me, if I can do it, you can too.