File:British Assault Rifles MOD 45162602.jpg

English: Pictured (field stripped) is the the EM-2, also known as Rifle No.9 Mk1 or Janson rifle, which was an experimental British assault rifle.

It was briefly adopted by British forces in 1951, but the decision was overturned very shortly thereafter by Winston Churchill's incoming government in an effort to secure NATO standardisation of small arms and ammunition.

An innovative weapon with the compact bullpup layout and an optical sight, it used one of the early intermediate cartridges (a concept introduced by the Germans with the 7.92×33mm Kurz) as a result of combat experience and German advances in weapons design during World War II.

It used the experimental, intermediate powered, but highly efficient .280 British round, which was designed to replace the venerable .303 round and Lee–Enfield rifle variants which had served since before the turn of the 20th century.

As the EM-2 could not be easily adapted to the longer and more powerful 7.62×51mm NATO round, it faded from use. However, the bullpup layout for a British service rifle was finally adopted some years later in form of the SA80 assault rifle, the EM-2's spiritual successor, which remains in service today.

• Organization: MOD
• Object Name: DDC-17-144-056
• Supplemental Categories: EM-2, Guns, Weapons, Equipment
• Keywords: Field Stripped, Historic Weapon, EM-2, Equipment, Weapons, Gun, Firearm, Small Arms, Assault Rifle, SA80, Army
• Country: UK