Low Profile Gas Block .750
303 Stainless Steel. Available with black oxide finish or naked stainless Four 10-32 set screws two tangential clamping for added clamping. Will allow for attachment of any evolution accessories with compromising free floating barrel. Standard AR-15 barrel diameter .750 ”
We at 556 use these in approx 90% of our upper/rifle builds (the other 10% is usually customer provided), by far an exceptional gas block.