ODIN Works 9mm Medium Profile - Barrels Stainless Steel 7.5in. ODIN Works machined these AR15 Barrels from 416 stainless steel for maximum durability. These ODIN Works 9mm Blowback AR9 Barrels are 1:10 button-rifled which reduces jacket deformation and creates a more reliable barrel. Pick up one of these ODIN Works 9mm 1/2-28 Thread Barrels to enhance the aesthetic and function of your firearm. Specifications for ODIN Works 9mm Medium Profile Barrels: Manufacturer: ODIN Works Color: Stainless Steel Caliber: 9mm Luger Features of ODIN Works 9mm Medium Profile Barrels: Caliber: 9mm Button 1:10 rifling 416 stainless steel For blowback AR builds Works with Colt or Glock lowers 1/2-28 muzzle threads Medium profile