Upgrade or replace the barrel on your P226 with this original Sig Sauer part. The threaded barrel is chambered in 9mm and allows you to attach a suppressor or other muzzle device. A knurled thread cap protects the end when no device is attached. Replacement pistol barrels are specially heat-treated for toughness and durability. This MK25 model is 126mm, broached, and both chrome-lined and phosphated for extreme corrosion resistance. It is compatible with P226 pistols.