In NONE of the cases were the shell casings decisive to cracking the case. The were helpful clues, yes, to determining the caliber of weapon used. But in cases where bullets are recovered from victims, it’s the rifling characteristics compared to the murder weapon (if found) that was decisive, not the presence or absence of shell casings at the crime scene. Cops already know if you arrive at a shooting crime scene and there are no shell casings lying about, it’s a good working assumption that a revolver was used, or else the criminals had enough time to pick up their brass before fleeing the scene. Other clues that could be lifted from casings (like fingerprints) would be on them with or without “microstamping”.

What is always key are eyewitnesses and people who can disconfirm an accused perp’s supposed alibi, as well as the best forensic evidence that can be gleaned from the crime scene. The investigators look for means, motive, opportunity.
“Microstamping” is a red herring and a kludgy, hi-tech “fix” in search of a problem. Tried and true police work gets the job done without it, and wouldn’t be substantially aided by it, for all the reasons everyone has already discussed here.

Making all guns prohibitively expensive by over-regulation seems like 2A infringement to me.

So if a Crook lives in California or NY, they can just drive to Connecticut or Oregon/Nevada/New Mexico/Arizona ect and just BUY a bunch, if somehow their state makes it difficult to simply mail-order the part.

It would be exactly like how hi-cap mag sales work here in Mass. They’re illigal here unless they’re pre-ban manufacture. Most mail order companies have been threatened with lawsuits from our AG so Mail-order here is a PITA and some companies won’t do ANY buisness with us.

Still a 20 min drive to New Hampshire I could fill my truck to the brim with hi-caps and nobody will ask any questions. Its prefectly legal to do. We don’t do it because its a crime to drive across the state line with the mags in tow….and by “We” I mean people who follow the law.

So unless these dumb laws get passed nation wide the only people who will have stamped guns will be lawful people…and REALLY dumb criminals.