Editing M1 Abrams (section)

===Specialized===
[[File:M1 Surrogate Research Vehicle c. 1985.jpg|thumb|right|Surrogate Research Vehicle c. 1985. Note the four crew members located in the hull.]]

*'''Surrogate Research Vehicle''': The surrogate research vehicle (SRV) project was conducted from 1980 to 1987 to evaluate the effectiveness of different crew arrangements using a turretless Abrams test bed. These modifications included adding two crew stations to the front hull. Two crew positions were retained in a rotating basket where the turret had been.{{sfn|Hunnicutt|2015|p=276}}
* '''Armored Recovery Vehicle''': Initially known as the '''RV90''', this was a prototype designed by General Dynamics. It was produced under contract with TACOM in 1988 despite an earlier preliminary decision to procure the M88A1E1.<ref name="Jane's logistics" >{{cite book |editor1-last=Foss |editor1-first=Christopher F |editor1-link=Christopher F Foss |title=Jane's Military Vehicles and Logistics 1994–95 |publisher=Jane's Information Group |location=Surrey |year=1994 |isbn=0-7106-1162-5 |page=53 |edition=15th |chapter=Armoured Recovery Vehicles |url=https://archive.org/details/janesmilitaryveh0000unse}}</ref> The prototype was evaluated against the [[M88 Recovery Vehicle|M88A1E1]] later that year.{{sfn|Hunnicutt|2015|p=271–273}} The Abrams RV was based on the Abrams chassis, but housed a crew of three in a unique armored superstructure. The Army selected the M88A1E1 regardless,<ref name="Jane's logistics" /> which went into production as the M88A2 Hercules.{{sfn|Hunnicutt|2015|p=271–273}}
*'''Air Ground Defense System''' ('''AGDS'''): Proposed air defense variant of the Abrams equipped with dual 35&nbsp;mm [[Bushmaster III]] autocannons, 12 [[Air Defense Anti-Tank System|ADATS]] missiles and advanced electro-optical and radar targeting systems derived from the ADATS. It was supposed to be capable of both air defense and anti-tank purposes with the ADATS MIM-146 missiles which was a dual purpose ATGM/SAM. The proposal never saw consideration and was never developed further.<ref>{{Cite journal|last1=Sharoni|first1=Asher H.|last2=Bacon|first2=Lawrence|date=July–August 1996|title=Forward Area Air-Ground Defense |url=https://books.google.com/books?id=3TIN9O_JusgC&q=m1+agds&pg=PA17|journal=Armor|volume=105|issue=4|pages=15–20|via=Google Books|access-date=19 October 2020|archive-date=14 January 2023|archive-url=https://web.archive.org/web/20230114043819/https://books.google.com/books?id=3TIN9O_JusgC&q=m1+agds&pg=PA17 |url-status=live}}</ref>
[[File:Panther II US Army.jpg|thumb|right|Panther II in 2002]]
* '''M1 Panther II''': A [[demining|mine-clearing vehicle]] with turret removed, mine rollers on the front, and magnetized dog bone.<ref>{{cite book |editor1-last=Collin |editor1-first=King |title=Jane's Mines and Mine Clearance 1998–99 |publisher=Jane's Information Group |location=London |year=1998 |isbn=0-7106-1803-4 |page=565 |edition=3rd |chapter=Mine Clearing Equipment |url=https://archive.org/details/janesminesminecl0000unse}}</ref>{{sfn|Green|Stewart|2005|p=24}} This could be operated remotely or with a crew of two. Six were built and two were deployed in 2007 by the USMC in Iraq.{{sfn|Zaloga|2019|p=39-40}}
* '''[[M104 Wolverine]] Heavy Assault Bridge''': GDLS produced these under contract for the U.S. Army with testing beginning in 1996. The {{convert|26|meter}} bridge was produced by [[Krauss-Maffei Wegmann]]. The chassis is an Abrams converted to M1A2 standard. Forty-three units were produced when production wrapped up in 2003.<ref name="Janes 2011"/>
*'''Battle Command Vehicle''': The vehicle was visually modified with a mock M256 gun to appear like an ordinary Abrams MBT, but featured communications equipment and workstations for battle commanders. [[United Defense LP]] constructed a prototype which the Army tested at Fort Hood in 1997.{{sfn|Foss|2002|p=610}}
*'''Visually modified''': The [[National Training Center]] possesses 28 [[visually modified]] M1A1s resembling [[T-80]]s.<ref name="Janes 2011"/>
* '''M1 Grizzly''' ('''Breacher'''): In 1997 TACOM awarded United Defense a $129 million contract to construct this vehicle based on the Abrams chassis. This was capable of clearing minefields and demolishing obstacles with its dozer blade and telescopic power-driven arm. The chassis had suspension of M1A2 standard and was operated by a crew of two. Two vehicles were delivered to the Army in 1999. Development was halted by the following year.{{sfn|Foss|2002|p=148–154}}

[[File:M1 Grizzly 2.jpg|thumb|A Grizzly Combat Mobility Vehicle (CMV)]]

* '''[[M1074 Joint Assault Bridge]]''' ('''JAB'''): Bridgelayer combining a heavy "scissor" bridge with the M1 Abrams chassis. Expected to reach low-rate initial production in 2019 to replace the [[M60 AVLB]] and M104 Wolverine.<ref>[http://www.defensenews.com/articles/army-drs-set-to-integrate-new-bridging-system-on-tanks Army, DRS Set To Integrate New Bridging System on Tanks] – Defensenews.com, 6 September 2016</ref>
* '''[[M1150 Assault Breacher Vehicle]]''' ('''ABV'''): Assault variant for the USMC. Based upon the M1A1 Abrams chassis, the Assault Breacher Vehicle has a variety of systems installed, such as a full-width mine plow, two [[mine-clearing line charge|linear demolition charges]], and a lane-marking system. [[Reactive armor]] has been fitted to the vehicle providing additional protection against HEAT warhead-based weapons. The turret has been replaced by a new smaller one with two MICLIC launchers at its rear. A M2HB .50 machine gun in a remote weapons station is mounted on the commander's cupola and a bank of grenade launchers are fitted to each side of the superstructure to cover the frontal arc for self-protection.<ref>Abramson, Mark, "[http://www.stripes.com/article.asp?section=104&article=67677 ABVs ready to break Afghan ground]", ''[[Stars and Stripes (newspaper)|Stars and Stripes]]'', 1 February 2010.</ref>