Additional Service: NFA/SBR Engraving – Receiver Notch$4900 Category: Build Your Own Product ID: 6698 Laser engraving for your Form 1 tax stamp. Required if you plan to register your gun as a Short Barreled Rifle. Additional Service: NFA/SBR Engraving - Receiver Notch quantity Add to cart Description Description Laser engraving for your Form 1 tax stamp. Required if you plan to register your gun as a Short Barreled Rifle.