[3] The Armstrong guns would be produced at the Royal Works at Woolwich as well as at the new Elswick Ordnance Company founded in Newcastle on 1 January 1859.

Armstrong had improved the Royal Artillery works at Woolwich to produce his breechloaders, but left office in 1863.

These used Armstrong's method of manufacturing the gun barrel, and the first attempts to produce a RML also used his shunt principle for rifling.

A coil was a wrought iron part pressed against the steel inner tube to prevent it from bursting under the pressure of the charge.

The Armstrong gun retained a larger number of smaller coils,[12] which was more expensive to make.

[13] Locally known as cañón giratorio de 115 libras (rifled 115-pounder), an Armstrong 7-inch muzzle-loader was selected as the main armament of the Chilean Navy corvette Magallanes.

For rifled guns, the Dutch navy at first relied on national developments like the RML 16 cm No.

When the Dutch decided to build an armored fleet for home defense, they selected the RML 9-inch Armstrong Gun as its main armament.

In this respect, they closely followed the Royal Navy, which at first mounted the RML 9-inch 12-ton gun as its main armament.

For their unarmored steam frigates and corvettes, the Dutch at first continued to rely on 16 cm RML's.

The Dutch used two kinds of pointed iron grenades puntgranaat for the 7 inch Armstrong gun.