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Updated March 15, 2023
The Army's Armored Multi-Purpose Vehicle (AMPV)

Background
The Army describes the Armored Multi-Purpose Vehicle
(AMPV) in a March 14, 2023 press release:
[The] AMPV is the replacement for the M-113
Family of Vehicles within the Armored Brigade
Combat Team (ABCT), comprising approximately
30 percent of its tracked vehicle fleet. The Army's
worldwide fleet of AMPVs will include nearly
3,000 vehicles delivered within the next 20 years.
The M1283 General Purpose (GP) variant
(Figure 1) provides protected maneuver for soldiers
alongside ABCT combat vehicles during tactical
operations and provides support to the infantry
squad during mounted/dismounted assault during
tactical operations. The GP variant accommodates
two crew and four soldiers and is reconfigurable to
carry one litter.
The M1284 Medical Evacuation variant supports
the ABCT integration of medical support and
casualty evacuation (CASEVAC) as an integrated
part of the networked combat forward formation,
enhancing the organic medics who ride with and
accompany cavalry units during mounted and
dismounted operations. Crew capacity is for three
crewmembers,   and   a  reconfigurable  crew
compartment that accommodates four     litter
casualties, six ambulatory (sitting) casualties, or a
combination of two litter and three ambulatory
casualties.
The M1285 Medical Treatment (MT) variant
integrates advanced medical treatment in a mobile
surgery suite to the ABCT. The MT hosts four
crewmembers, which includes a medic and
Physician Assistant or Unit Surgeon, and a
treatment table that can serve to carry one litter
patient. The vehicle also hosts the capability for
onboard medical equipment for casualty care.
The M1286 Mission Command (MCmd) variant
is the cornerstone of the Army's ABCT Network
Modernization Strategy. It takes advantage of
increased size, weight, power, and cooling and
provides a significant increase in Command,
Control, Computers, Communications, Cyber,
Intelligence, Surveillance, and Reconnaissance
capability. The  variant  accommodates  two
crewmembers, and three workstation operators, and
its hosted network provides full Tactical Command
Post capabilities at brigade and battalion levels.

The M1287 Mortar Carrier (MC) variant
provides immediate, responsive, heavy mortar fire
support to the ABCT in the conduct of fast-paced
offensive operations by utilizing the M-121 Mortar
System and M-95 Mortar Fire Control System. The
MC variant accommodates four soldiers - one
vehicle  crewmember     and   three  mortar
crewmembers.
Figure I. The Armored Multi-Purpose Vehicle
(AMPV) General Purpose Variant

Source: United States Army Acquisition Support Center,
https://asc.army.mil/web/portfolio-item/gcs-ampv/, accessed January
18, 2021.
Program Status
The AMPV is produced by BAE Systems in York, PA. On
January 25, 2019, the AMPV entered the low-rate initial
production phase (LRIP). The Army originally planned for
acquiring a total of 2,907 AMPVs, with initial vehicle
delivery in 2020. The AMPV program plans to replace
2,897 M-113 vehicles at the brigade and below level within
the ABCT. There are an additional 1,922 M-113s
supporting non-ABCT affiliated units (referred to as
Echelons Above Brigade [EAB] units) that are not included
in the Army's modernization plan.
Low-Rate Initial Production (LRIP) is a programmatic
decision made when manufacturing development is completed
and there is an ability to produce a small-quantity set of
articles. It also establishes an initial production base and sets
the stage for a gradual increase in the production rate to
allow for Full-Rate Production (FRP) upon completion of
Operational Test and Evaluation (OT&E).
Full-Rate Production (FRP) is a decision made that allows
for government contracting for economic production
quantities following stabilization of the system design and
validation of the production process.