I'm looking into picking up a NATO Stock AUG A3 variant as it will let me share mags with my AR's while still having a unique bullpup; I am disappointed by the lack of a bolt release button though. I know that getting an MSAR stock and fire control group then fitting it an AUG A3 receiver would work. But those are becoming harder to find, and I'm also curious about the possibility of having a competent smith add an after market bolt release button to a Steyr made AUG NATO stock. Has anyone tried this before, knows of where to get the parts, or has recommendations on a good smith?