Question: When did the military group joined by Frederick Mayes start using the sa80?

full_context: Document 1: SA80: The SA80 is a British family of 5.56 × 45mm NATO small arms, all of which are selective fire, gas - operated assault rifle s. The L85 rifle variant of the SA80 family has been the standard issue service rifle of the British Armed Forces since 1987, replacing the L1A1 variant of the FN FAL. The first prototypes were created in 1976, with production ending in 1994. The A1 variant was significantly upgraded in the early 2000s by Heckler & Koch as the SA80A2 and remains in service as of 2017. In mid-2016 a prototype A3 variant was showcased which further improved on the weapon and is reportedly being considered to extend the out of service date beyond 2025.
Document 2: Maung Aye: Maung Aye graduated from the Defence Services Academy in Pyin U Lwin with a Bachelor of Science degree in 1959. In 1968, he became commander of the Northeast Region. In 1988, he became commander of the Eastern Region. Two years later he was promoted to major-general. In 1992 he was made Army Chief. In 1993 he was named Lieutenant General and the Deputy Commander in Chief of Defense Services. In 1994 he was appointed Deputy Chairman of SLORC, and subsequently held the same position in the SPDC.
Document 3: Frederick Edgar Ferguson: Frederick Edgar Ferguson (born August 18, 1939) is a former United States Army warrant officer and later officer, as well as a recipient of the United States military's highest decoration—the Medal of Honor—for his actions in the Vietnam War while a chief warrant officer 3.
Document 4: Frederick Clarke (British Army officer): Brigadier Frederick Arthur Stanley Clarke DSO (3 October 1892 – 3 January 1972) was a British Army officer who served in both World Wars.
Document 5: SA80: After receiving feedback from users and incorporating the various design changes requested, including adapting the rifle for use with the heavier Belgian SS109 version of the 5.56×45mm round and improving reliability, the weapon system was accepted into service with the British Armed Forces in 1985 as the SA80. The SA80 family originally consisted of the L85A1 Rifle, the L86A1 Light Support Weapon (LSW), and L98A1 Cadet GP Rifle. The first weapons were issued in October 1985.
Document 6: AR-15 style rifle: In 1956, ArmaLite designed a lightweight assault rifle for military use and designated it the ArmaLite Rifle - 15, or AR - 15. Due to financial problems, and limitations in terms of manpower and production capacity, ArmaLite sold the design and the AR - 15 trademark along with the ArmaLite AR - 10 to Colt's Manufacturing Company in 1959. In 1964, Colt began selling its own version with an improved semi-automatic design known as the Colt AR - 15. After Colt's patents expired in 1977, an active marketplace emerged for other manufacturers to produce and sell their own semi-automatic AR - 15 style rifles. Some versions of the AR - 15 were classified as ``assault weapons ''and banned under the Federal Assault Weapons Ban.
Document 7: ArmaLite AR-10: The final Artillerie Inrichtingen design is known as the "Portuguese" model AR-10. This final version incorporated all that had been learned to date about the AR-10, including infantry service rifle and field test reports. In addition to a heavier barrel with chrome-lined chamber, optional bipod, and the removable plastic/metal handguards of the Transitional model, the Portuguese variant had wider bolt lugs, a stronger extractor, a new simplified three-position gas regulator, and a cocking handle featuring a forward bolt assist. It is believed that approximately 4,000-5,000 Portuguese variants were produced; nearly all of them were sold to the Portuguese National Defense Ministry by the Brussels-based arms dealer SIDEM International in 1960. The AR-10 was officially adopted by the Portuguese paratrooper battalions ("Caçadores páraquedistas"), and the rifle saw considerable combat service in Portugal's counter-insurgency campaigns in Angola and Mozambique.
Document 8: ArmaLite AR-15: The ArmaLite AR - 15 was a select - fire, air - cooled, gas - operated, magazine - fed assault rifle manufactured in the United States between 1959 and 1964. Designed by American gun manufacturer ArmaLite in 1956, it was based on its AR - 10 rifle. The ArmaLite AR - 15 was designed to be a lightweight assault rifle and to fire a new high - velocity, lightweight, small - caliber cartridge to allow the infantrymen to carry more ammunition.
Document 9: Ak 5: The first versions of the Ak 5 family were made by the Swedish company FFV Ordnance AB (now part of Saab Bofors Dynamics) under license from FN, with deliveries starting in 1986. This version of the Ak 5 is still in the inventory of the Swedish Armed Forces, but is no longer issued to soldiers, having been replaced by the Ak 5C and Ak 5D. This version uses fixed iron sights, and the Swedish Armed Forces have estimated that the maximum practical distance is 400 meters, but it can be used at longer ranges. This brings it in line with the M16, using the Swedish Armed Forces definition of maximum practical distance.
Document 10: Maxwell Brander: Born on 11 October 1884, Maxwell Brander was educated at Bedford School and at the Royal Military College, Sandhurst. He received his first commission in the British Army in 1906. He served during the First World War and was mentioned in dispatches. Promoted to the rank of Major General in 1936, he was Director of Supplies and Transport at the War Office between 1937 and 1940, and Deputy Director-General of Mechanization at the Ministry of Supply between 1941 and 1947.
Document 11: SAR 21: The SAR 21 ("Singapore Assault Rifle - 21st Century") is a bullpup assault rifle designed and manufactured in Singapore. First revealed and subsequently adopted by the Singapore Armed Forces (SAF) in 1999, it was designed and developed over a four-year period and was intended to replace the locally license-built M16S1 by the Ministry of Defence (MINDEF), Singapore Army and the Chartered Industries of Singapore (CIS, now ST Kinetics). Many of its design features are directly intended to counter the weaknesses of the M16S1 as encountered operationally by some infantrymen.
Document 12: Ministry of Defence (United Kingdom): There are also three Deputy Chiefs of the Defence Staff with particular remits, Deputy Chief of the Defence Staff (Capability), Deputy CDS (Personnel and Training) and Deputy CDS (Operations). The Surgeon General, represents the Defence Medical Services on the Defence Staff, and is the clinical head of that service.
Document 13: FN F2000: The FN F2000 is a 5.56×45mm NATO bullpup assault rifle, designed by FN Herstal in Belgium. The F2000 made its debut in March 2001 at the IDEX defence exhibition held in Abu Dhabi, in the United Arab Emirates. As of early 2019, the F2000 is removed from the FN international and US websites.
Document 14: Frederick Mayes: Major General Frederick Brian Mayes, CB, FRCS (born 24 August 1934) is a retired senior British Army officer. He was Director General of the Army Medical Services from 1993 to 1996.
Document 15: David Mostyn: Educated at Downside School and at the Royal Military Academy, Sandhurst, David Mostyn was commissioned into the Oxfordshire and Buckinghamshire Light Infantry in 1949. He was mentioned in despatches for helping to suppress the Brunei Revolt in 1962 whilst serving with the 1st Green Jackets (43rd and 52nd). In 1969 he was appointed Commanding Officer of the 2nd Battalion The Royal Green Jackets and was deployed to BAOR and Northern Ireland. In 1972 he went on to command the 8th Infantry Brigade. In 1980 he became Commandant of the British Sector in Berlin and in 1983 he was appointed Military Secretary. He went on to be Adjutant General in 1986 retiring from the British Army in 1989.
ground_truth: 1987
sub_queries: Frederick Mayes >> military branch Answer: British Army
when did British Army start using the sa80 Answer: 1987