I've got a nice gas block which I ended up not using for sale.
This is a YHM 2 piece gas block with top and bottom rails. Includes 4 allen head screws for a super tight fit on standard barrels and is extremely easy to install.
With this gas block you don't need to remove your muzzle break, etc..... A MUST for pinned breaks!
YHM list price is $66.95 for this peice. It's BRAND NEW and has zero flaws/marks.