The Scicon PDW / Individual Weapon (IW) was developed in the mid-1980s as part of the Infantryman 2000 concept. It was a two-barreled weapon with an offset conventional scope/handle. Scicon Ltd. expected it to be in service with the British Army by the year 2000, but the project was cancelled before it could advance beyond the prototype stages. The rifle (lower barrel) was intended to fire 4.7mm caliber caseless rounds, and had an integrated 10mm caliber (some sources claim 30mm) grenade launcher component (upper barrel) able to fire various munitions ranging from anti-personel/incendiary/high-explosive/signal flares. There are some reports that claimed that two functioning prototypes were completed, apart from the PR and ergonomic handling mock-ups.
Soldier of the future, The Business Times, 16 June 1984, Page 1
Janes Military Review Fourth Year of Issue, ISBN 0-7106-0334-7, Published 4/1/1985
Warrior 2000: Battle By Remote Control. International Combat Arms The Journal of Defense Technology, Special NATO Issue November 1987 Vol 5 No 6
Firefight!: The History of Personal Firepower - Peter Newark, Newton Abbot: David & Charles, 1989, Infantryman of the future P.182, ISBN-10:ā 0715391763
The Ultimate Weaponry, Paddy Griffith, The Empty Battlefield Page 150, CN 5219 Published 1991