The Armstrong gun—mainly the 12 pounder—was used extensively in the 1863 conflict in New Zealand between British troops and Maori in the Waikato. A well preserved 12-pounder which was used in the battle of Rangiriri is at the Te Awamutu museum. The barrel can traverse 6 degrees left or right without moving the gun carriage. The wheels are wooden with a 75 mm wide steel band. The wheel diameter is 1.7 m. The track width is 1.8 m. Barrel width at the muzzle is 140 mm. Such was the confidence of the army in the accuracy of the gun that at the battle of Hairini Ridge the artillery was fired over the heads of the advancing infantry as they stormed the ridge. The infantry took cover in a slight depression in the ground in front of the Maori trenches and then stormed the trenches when the shelling stopped.