
Two 7mm (.280 in) prototypes were built in a bullpup configuration, designated the EM-1 and EM-2. The idea dates back to the late 1940s, when an ambitious programme to develop a new cartridge and new class of rifle was launched in the United Kingdom based on combat experience drawn from World War II.

The SA80 was the last in a long line of British weapons (including the Lee–Enfield family) to come from the Royal Small Arms Factory, the national arms development and production facility at Enfield Lock, before its weapons factory was closed down in 1988. The remainder of the SA80 family comprises the L86 Light Support Weapon, the short-barrelled L22 Carbine and the L98 Cadet rifle. The A3 variant was first issued in 2018 with several new improvements. The A2 variant came to be as the result of a significant upgrade in the early 2000s by Heckler & Koch and remains in service as of 2020. The first prototypes were created in 1976, with production of the A1 variant starting in 1985 and ending in 1994.

The L85 Rifle variant has been the standard issue service rifle of the British Armed Forces since 1987, replacing the L1A1 Self-Loading Rifle. The SA80 (Small Arms for the 1980s) is a British family of 5.56×45mm NATO service weapons used by the British Army. Telescopic SUSAT, ACOG and ELCAN LDS scopes, aperture iron sights RSAF Enfield, Royal Ordnance, Heckler and KochĤ.98 kg (11.0 lb) (L85A2 with SUSAT sight and loaded 30-round magazine) ģ00–1,200 m depending on weapon on usage L85A2 with ELCAN LDS and 2009 upgrade suite
