Stiffi Mamba Carbon Fiber Barrels in Yellow are the lightest (only 1.7 oz.) and the most accurate barrel on the market. It's proudly made in the USA with the finest aerospace grade materials and processing. Rated Barrel of Choice in IGN's "Paintball Gear Buyer's Guide"; #1 in the "2007 Annual Gear Guide" of FaceFull magazine; awarded the "Editor's Choice for Best Scenario Barrel", SPLAT magazine these barrels aren't messing around! They are micro-jeweled stepped bore for exceptional speed and accuracy. Stiffi is the only 1-piece carbon fiber barrel on the market.