Additional Service: NFA/SBR Engraving – Cocking Channel$4900 Category: Build Your Own Product ID: 6707 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 - Cocking Channel 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.