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Hi Thomas, no sir, the slide is not serialized, this item can be sent straight to your house. Stay safe & have a great day!

Hi Thomas and welcome. The slide is serialized but an upper/slide is considered a part and not firearm so will ship direct to your house same as a complete AR Upper. Cheers, stay safe and enjoy!

they do not require a S/n but I would ask HK if they have a s/n or not Customer Service: (706) 701-5554, Hours (M-F 9:30AM – 4:30PM)