Tracking this thread closely as I'm in a similar situation.
@ElDiablito are you planning on mounting your rear peep to the WA rail? I plan to do my load development with my scope then remove it and mount a rear peep to the rail. I'm waiting for my rail to come in so I can quantify rear peep height and what I'll need for the front. I'm hoping I can use a Western Precision globe but not sure if my rear sight configuration will be too tall. Also, the front sight threads on the G3 are 4-40 and the Western Precision globe calls out 6-48/8-40 screw. Might need to drill out/re-tap for the larger screw or use some epoxy if keeping the 4-40 to keep from slipping.
I'm new to MZ this season and picked up a blem G3 based off of your feedback and received it a few weeks ago. It is a VERY nice/well constructed firearm (probably the nicest one I own now from a craftsmanship perspective). Thanks for the recommendation!