Upgrade or replace the barrel on your P229/228 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. SIG SAUER factory replacement pistol barrels are specially heat-treated for toughness and durability. This barrel will not work with a barrel that is currently labeled with “P229-1”