if you have an A2 style front sight there are some options for reducing gas with that as well.
Yondering, I would be interested to hear more about that solution.
There are a couple options, but one that I like is to remove the sight and tap the gas port hole (in the sight) for a set screw, IIRC a #8-32 but I'd have to check my notes. The screw can then be drilled out in incrementally larger sizes until desired function is achieved. The set screw ends up being a gas restriction bushing, and when everything is assembled it's captured in the sight between the barrel and gas tube. You can also use an unthreaded bushing but it's not as convenient.
You can do this on just about any gas block, including an A2 front sight.
The downside to that method is the development time; i.e. it takes several installs and removals to work up to the right size hole, but the upside is that once it's done, it's invisible and never loses adjustment. It's the next best thing to having the barrel port sized right to start with, and is functionally the same.
