M1161 Growler

File:USMC ITV ESS.jpg mortar, and M1161 ITV-LSV Growler variants]]

Development for the Growler began in 1999 by American Growler when the Marine Corps sought a vehicle that could be transported in a V-22 Osprey. Though the initial design used elements and parts from the drive train of the M151 which it was intended to replace, the final design featured entirely new parts and systems to allow it to fulfill its mission. This included allowing it to fit within the confines of a {{nobr|V-22}}'s cargo bay. No major components from the M151 design are used in the manufacture of the M1161 or M1163 variant. Initial engineering of the M1161 is most closely related to American Growler's commercial UV 100 DB off-road vehicle. Manufacture of the Growler variants was later transferred to General Dynamics facilities but are otherwise identical.[https://web.archive.org/web/20140611004328/http://www.highbeam.com/doc/1G1-191905664.html Land: light but 'hot': special operations forces units historically operate at the 'light' end of the equipment spectrum and rely primarily upon stealth for their survivabilit...]{{cite web|url=https://www.angelfire.com/biz/troopsupport/dunebuggy.html |title=UV100DB Tactical Military Dune Buggy |publisher=Angelfire.com |date=2001-03-20 |access-date=2013-11-16}}{{Citation |last=Komarow |first=Steven |title=Corps pays $100K for retooled jeep |newspaper=USA Today |pages=A04 |date=December 29, 2005 |url=https://www.usatoday.com/news/washington/2005-12-28-corps-jeep_x.htm}}

Two different versions of the Growler were developed; the M1161 light strike vehicle (LSV), and the M1163 prime mover variant as part of the Expeditionary Fire Support System (EFSS) towed heavy 120 mm mortar. A number of the separate 36-round ammunition trailers, the M1162, were ordered but further design was dropped and its duties to carry the 35 lb mortar shells were incorporated into the M1163 Prime Mover. The M1161 LSV variant is armed with either an M2HB .50cal BMG machine gun, M240G 7.62mm MG or Mk19 40 mm automatic grenade launcher. The 120 mm mortar towed by the M1163 Prime Mover is the French RT-120, deployed by United States forces as the M327 Dragon Fire. The Growler's central role of cross-country scout and aerially-deployed forward unit has led to further modifications, including use of the rifled precision extended range munition (PERM) system.{{cite web|url=http://www.gd-ots.com/efss_120mm_RifledMortar.html |title=EFSS - 120MM Rifled Mortar Ammunition Suite - General Dynamics Ordnance and Tactical Systems |publisher=Gd-ots.com |access-date=2013-11-16}}

File:USMC-111026-M-KU932-203.jpg towed 120mm heavy mortar and M1163 Growler back into an MV-22 Osprey on board {{USS|Iwo Jima|LHD-7|6}}.]]

On November 10, 2004, the Marine Corps Systems Command (MCSC) awarded indefinite-delivery, indefinite-quantity contract M67854-05-D-6014 with firm-fixed-price and cost-plus-award-fee contract line-item numbers for a base year and up to six option years to General Dynamics Ordnance and Tactical Systems (GDOTS) for $12,057,159 for procurement of 66 EFSSs and up to 650 ITVs. The MCSC selected GDOTS over two other offerors. On September 20, 2007, Senator Carl Levin, Chairman of the Senate Committee on Armed Services filed a protest on behalf of a constituent, Rae-Beck Automotive, LLC, a subcontractor to one of the losing offerors. The DOD inspector general's audit did not substantiate most of the constituent’s concerns, but did note concerns with the MCSC program management and contract award for the EFSS and ITV programs.{{cite book|last1=Inspector General|first1=United States Department of Defense|title=Expeditionary Fire Support System and Internally Transportable Vehicle Programs|date=14 January 2009|edition=Report No. D-2009-041|url=http://www.dodig.mil/audit/reports/fy09/09-041.pdf|access-date=17 December 2014}}

By 2008, unit cost had risen by 120%, leaving each Growler scout variant with a cost of $209,000 per unit. The prime mover mortar contract price rose by 86%, to $1,078,000 cost per unit. The first Growlers were deployed to Marine units in January 2009 for field testing, one year beyond the contracted delivery date. By August 2011, 209 M1161s and 102 M1163s had been produced, with 42 additional M1163s on order. Eventually, 266 M1161 ITVs and another 145 "prime mover" variants were purchased. The vehicles saw combat with elements of MARSOC in Afghanistan from 2011-2014.{{Cite web |url=http://www.marinecorpstimes.com/news/2008/06/marine_ITV_060808w/ |title=Corps set to begin fielding ITV this summer - Marine Corps News, news from Iraq - Marine Corps Times |access-date=2012-11-16 |archive-url=https://web.archive.org/web/20081121221611/http://www.marinecorpstimes.com/news/2008/06/marine_ITV_060808w/ |archive-date=2008-11-21 |url-status=dead }}{{Failed verification|date=January 2022}}

Problems with M1161 and M1163's throttle system were identified in May 2012 following an accident at MCB Camp Pendleton, California. The entire vehicle fleet was grounded, pending repair.{{Citation |last=Pincus |first=Walter |title=Marines' New Ride Rolls Out Years Late |newspaper=Washington Post |pages=A04 |date=3 Feb 2009 |url=https://www.washingtonpost.com/wp-dyn/content/article/2009/02/02/AR2009020202969.html?referrer=emailarticle}}

During RIMPAC 2014, the Marines fitted a Growler ITV with Torc Robotics' Ground Unmanned Support Surrogate (GUSS) system, turning it into an unmanned ground vehicle. The GUSS system's aim is to lighten troops' loads by carrying up to {{convert|1,600|lb|kg|abbr=on}} of equipment; it can also serve as an unmanned medical evacuation vehicle. A GUSS-equipped ITV can autonomously follow a person wearing a beacon at a predetermined distance while cruising at up to {{convert|8|mph|km/h|abbr=on}}. A Marine can take direct control of the vehicle through a robotic controller or switch it to manual operation and drive it themselves if needed. The unmanned ITV may be fielded within five years.[http://www.gizmag.com/guss-autonomous-truck-us-marines/33270/ Marine Corps tests autonomous mini-truck] – Gizmag.com, 6 August 2014

In June 2012, the United States Special Operations Command (USSOCOM) expressed interest in procuring Non Developmental Item (NDI) vehicles that would be highly mobile, {{nobr|V-22}} transportable platforms.[https://www.fbo.gov/index?s=opportunity&mode=form&id=eb31bc3bbfd9375e2ea095cb7304f917&tab=core&_cview=1 V22 ITV – Federal Business Opportunities: Opportunities] The Marines are seeking a replacement for the Growler ITV, running parallel with SOCOM's efforts to develop a new Osprey-transportable vehicle. The effort comes from higher demand in operations and the service's Expeditionary Force 21 concept, which emphasizes lighter forces. Quick-reaction Marine expeditionary units typically deploy with as many as 20 ITVs.

A limited objective experiment and technical assessment was conducted by the Marine Corps Warfighting Laboratory in September 2015 to define the need and find vehicles to fill it, performing missions ranging from light strike to logistics and casualty evacuation.[http://www.defensenews.com/story/defense/show-daily/sofic/2015/05/19/usmc-eyes-upgrades-replacement-for-osprey-carried-vehicle/26933229/ USMC Eyes Options for Light Vehicle] – Defensenews.com, 20 May 2015 The conclusion was that the ITV vehicles were ineffective as a strike vehicle, but worked well as a logistics vehicle by removing a lot of weight from Marines' backs.

Manufactured between 2004 and 2010, Growler ITV procurement and fielding was ineffectively timed since operations in Iraq and Afghanistan led to most units relying on armored vehicles because of the threat of roadside bombs. Originally intended for infantry, Growlers were fielded primarily with reconnaissance, marine special operations, and artillery communities. A new ITV would be fielded with infantry forces to serve company-sized landing teams. Although designed for light strike, experiments have shown an ITV's greatest roles to be casualty evacuation (CASEVAC) and logistics to lighten individuals' loads. Replacement efforts were anticipated to begin in 2018.{{cite web|url=http://www.marinecorpstimes.com/story/defense/show-daily/modern-day-marine/2015/09/24/us-marines-mull-replacement-osprey-carried-vehicle/72742580/|title=US Marines Mull Replacement for Osprey-Carried Vehicle|work=Marine Corps Times|date=24 September 2015}}

In February 2019, GovPlanet announced that it will be selling the ITV Growlers to the public for the first time. Growlers will be sold by public auction in March 2019.[https://blog.ironplanet.com/govplanet-sells-itv-and-mtvrs/ GovPlanet set to sell U.S. military ITV and MTVR vehicles for first time ever] - Govplanet.com

• {{flag|USA}} United States Marine Corps: 600{{Cite web |url=http://www.growlerme.com/aboutus.html |title=Munitions trailers, Growler Manufacturing and Engineering About Us |access-date=2018-12-26 |archive-date=2014-05-25 |archive-url=https://web.archive.org/web/20140525021115/http://growlerme.com/aboutus.html |url-status=dead }}

Plus "approximately 1,000 vehicles to foreign militaries around the world."{{Cite web|url=https://www.manufacturednc.com/American-Growler-Inc|title=American Growler, Inc. | Manufactured in North Carolina}}

• Desert Patrol Vehicles
• Interim Fast Attack Vehicle
• Spider LSV
• Phantom Badger (also certified for the V-22)
• SPECTRE light vehicle
• CS/VP-4

{{reflist}}

• [http://www.growlerme.com/products/m1161lightattackvehicle.html Official site of Growler Manufacturing and Engineering, the current Growler manufacturer.]
• [http://www.growlerme.com/images/New_M-1161_Brochure10-09-2014.pdf Current Growler brochure PDF]
• [http://www.growlerme.com/images/New_M-1163_Brochure10-09-2014.pdf Current Growler Prime Mover brochure]
• [https://web.archive.org/web/20120319231258/https://www.marcorsyscom.usmc.mil/news/syscomnews.nsf/StoriesDisplay/CADF2357DD5084E28525754E0073A717?OpenDocument Marines take fight to the enemy with EFSS]
• [https://blog.ironplanet.com/govplanet-sells-itv-and-mtvrs/ GovPlanet set to sell U.S. military ITV and MTVR vehicles for first time ever]
• {{cite web|title=M1161 Growler Internally Transportable Vehicle |url=http://www.warwheels.net/M1161GrowlerITVindex.html |url-status=dead |archive-url=https://web.archive.org/web/20120516072745/http://www.warwheels.net/M1161GrowlerITVindex.html |archive-date=May 16, 2012}}
• {{cite web|title=Light Strike Vehicle (LSV)|url=http://www.gd-ots.com/efss_LSV.html|url-status=dead|archive-url=https://web.archive.org/web/20121101011412/http://www.gd-ots.com/efss_LSV.html|archive-date=2012-11-01}}
• {{cite web|title=LSV Light Strike Vehicle |url=http://www.gd-ots.com/2011%20Brochures/LSV.pdf |url-status=dead |archive-url=https://web.archive.org/web/20120901061451/http://www.gd-ots.com/2011%20Brochures/LSV.pdf |archive-date=September 1, 2012}}
• {{cite web|title=INTERNALLY TRANSPORTABLE VEHICLE, LIGHT STRIKE VARIANT (ITV-LSV), M1161|url=http://www.marcorsyscom.usmc.mil/sites/GTES/PM%20MT/Documents/FutureSystems/ITVM1161.pdf}}{{Dead link|date=January 2020 |bot=InternetArchiveBot |fix-attempted=yes }}
• {{cite web|title=Growler crash leads to fleet suspension|url=http://www.marinecorpstimes.com/news/2012/05/marine-growler-fleet-suspended-crash-throttle-051212w/}}
• {{cite web|title=EFSS/ITV: The US Marines' Mobile 120mm Mortar System|url=http://www.defenseindustrydaily.com/EFSSITV-The-US-Marines-Mobile-120mm-Mortar-System-06756/}}

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