All this does is just give anyone with a half a brain in their head the two perfect accessories to commit crime.
Step 1) Pull microstamped pin and replace with aftermarket
Step 2) Visit indoor range and collect like caliber brass
Step 3) Commit crime with handgun, drop microstamped shell casings at scene from indoor rane
Step 4) Replace original firing pin SHOULD a miracle happen and the police show up to want to test your handgun.
Really? Please tell me someone on the anti-gun side has more brains than that. That's like playing Chess against brain dead vegetable.... wait. I digress.....