True adjustable gas block - Anderson Manufacturing Adjustable Steel Gas Block

I've used 3 of these Anderson blocks on my builds and they are by far the most consistent and fully functional adjustable blocks I've found. I tried going a cheaper route recently and found not only did the gas block not close off enough of the gas to be effective, but it was poorly made as well and I had gas leak out around the block itself. When I contacted the vendor, they didn't seem to think it was a big issue the block didn't "fully function". I've never had this with an Anderson. Anderson blocks also allow you to close it off completely, making it effectively a "bolt" action rifle. Regardless of whether it's closed completely or open just enough to allow the gun to cycle, it keeps the bcg and chamber much cleaner than a standard gas block.