M167 VADS

{{More citations needed|date=June 2008}}

{{Infobox weapon

| name = M167 VADS

| image = JASDF JM167A1 barrels right front view at Tsuiki Air Base November 26, 2017 02.jpg

| image_size = 300px

| caption = A JASDF JM167A1 mounted on an AA gun mount at Tsuiki Air Base.

| origin = United States

| type = Rotary cannon

| is_ranged = yes

| service = {{plainlist|

• 1965–1994 (United States)
• 1960s–present (other countries)

}}

| used_by = See Operators

| wars = War in Darfur
Sudanese conflict in South Kordofan and Blue Nile
Yemeni Civil War (2015–present)
Saudi Arabian-led intervention in Yemen

| designer = Rock Island Arsenal{{cite book | title=Jane's Land-Based Air Defence 1992-93 | date=1992 | publisher=Jane's Information Group | isbn=9780710609793 | editor-last1=Foss | editor-first1=Christopher | editor-last2=Cullen |editor-first2=Tony F.| page=215}}

| design_date = 1964

| manufacturer = {{plainlist|

• Armament Systems Department, General Electric
• Daewoo Heavy Industries Ltd

}}

| unit_cost =

| production_date =

| number =

| variants = See Variants

| spec_label =

| weight = {{convert|1583|kg|lb|abbr=on}} including carriage

| length = {{plainlist|

• {{convert|472.4|cm|in|abbr=on}} in travel configuration
• {{convert|386.1|cm|in|abbr=on}} emplaced {{cite book | title= Operator's Manual (Crew) for Gun, Air Defense Artillery, Towed, 20mm, M167A1 | date=22 May 1986 | page= 1{{hyphen}}1 | publisher = Headquarters, Department of the Army | url = https://archive.org/details/TM9-1005-286-10}}

}}

| part_length =

| cartridge = 20×102mm

| caliber = 20 mm (0.787 in)

| barrels = 6-barrel (progressive RH parabolic twist, 9 grooves)

| action = Hydraulically operated, electrically fired, rotary cannon

| rate = 1000 or 3000 rounds per minute{{cite book|title=FM 44-1-2: Air Defense Artillery Reference Handbook |publication-date=30 June 1978 |publisher=Headquarters, Department of the Army| url=https://archive.org/details/fm441278airdefenseartileryreference./ |page=2{{hyphen}}4}}

| velocity = 1030 m/s

| range = 1200m (Aerial) or 4500m (Ground)

| max_range =

| feed = 500rd linked feed {{cite book |title=FM 44-3: U.S. Army Air Defense Artillery Employment, Chaparral/Vulcan |publication-date=30 September 1981 | publisher=Headquarters, Department of the Army| page=4{{hyphen}}4 | url = https://archive.org/details/fm-44-3}}

| sights =

}}

The M167 Vulcan Air Defense System (VADS){{cite web|url=https://www.militaryfactory.com/armor/detail.asp?armor_id=119|title=M167 Vulcan Towed / Static Air Defense System - United States|website=Militaryfactory.com}}{{cite web|url=https://www.globalsecurity.org/military/systems/ground/m167.htm|title=M167 VADS Vulcan Air Defense System|first=John|last=Pike|website=Globalsecurity.org}}{{cite web|url=http://weaponsystems.net/weaponsystem/EE02+-+M167+Vulcan.html|title=M167 Vulcan - Weaponsystems.net|website=Weaponsystems.net}}{{cite web|url=https://militaryedge.org/armaments/20mm-m167-vads/|title=20mm M167 VADS|date=23 January 2014|website=Militaryedge.org|access-date=2 April 2018|archive-date=3 April 2018|archive-url=https://web.archive.org/web/20180403051650/https://militaryedge.org/armaments/20mm-m167-vads/|url-status=dead}} is a towed, short-range United States Army anti-aircraft gun designed to protect forward area combat elements and rear area critical assets. It was also used to protect U.S. Air Force warplane airfields and U.S. Army helicopter airfields. The heart of the M167 is the M168 Cannon, a variant of the M61 Vulcan 20×102 mm rapid-fire rotary cannon.

It was also effective against lightly armored ground targets. The M167 gun has now been withdrawn from service by U.S. military units, but is still used by other countries.