If you have a compensator, muzzle brake or fake suppressor and need it permanently pinned and welded, we can do it for you. Aluminum (most fake suppressors or made of aluminum) or steel, we thread on your muzzle brake, comp, or fake suppressor, drill it, tap in a pin and weld a small, yet permanent pin in place. Most barrels only need one pin that can be on the underside of the barrel to maintain a clean finish to any custom firearm. Send us your barrel with your comp, brake or fake suppressor or buy one from our site and we will pin it and weld it to fit your needs and requirements. Add $25.99 for return shipping if you are shipping just the barrel, shipping will be higher if you send a receiver or complete firearm. please call if you have any questions.