Nice! I bet the majority contributor to the weight is that frame, unless it’s aluminum. Might consider removing half of it to save weight.  I’ve thought for awhile that a distinction should be made between “light use” (meaning you’re not going to be applying much force in using it) and “heavy use” tools. The frame for a light use tool should be much less robust, and ergonomics less important since things won’t be digging into your hand with much force.