09-05-2021, 05:09 PM
No, adjustable gas blocks are not needed. As Klem says, they only really show up as needed if you are running surpressed, due to the odd gas pressure curve you get there. Otherwise, no - so long as the gas port isn't cut goofy-wrong (it usually isn't), then no, you don't need an adjustable block.
As to gas block leak, I've seen lots of guns leak a lot around the block, and some not at all. Never seen it to actually matter.
As to gas block leak, I've seen lots of guns leak a lot around the block, and some not at all. Never seen it to actually matter.