12-11-2018, 04:12 AM
I would say no, it's not needed. They can be really helpful if you're running a supressor, but otherwise it's just for tuning your pressure. It doesn't net you any more pressure than what's there. If you end up being under gassed you have to enlarge the port. If you're over gassed, it's not really a problem until it's a problem, causing bolt bounce and such. And you can go to a heavier buffer before going to an adjustable block.