Part of the Alstom Metropolis family, the initial order consisted of 106 two-car trains that were built in Sri City, India.

[5][6] This contract would include the delivery of rolling stock, automatic signalling, a control centre for the line, as well as operation and maintenance for a period of 30 years.

[7] Following a pre-qualification phase, CDPQ Infra announced on 10 November 2016, that three companies and consortia could place a bid:[8] On 8 February 2018, CDPQ Infra announced that Groupe PMM (Alstom and SNC-Lavalin O&M) had been selected for the $2.8-billion MRSEM contract,[9][10] with the contract award taking place in April 2018.

[16] The Coalition Avenir Québec (CAQ) provincial party was among those who desired at least parts of the contract to be awarded to Bombardier Transportation's factory in La Pocatière, Quebec, instead of to Alstom.

[18] Alstom argued that over 65 percent of the $2.8-billion contract value would be spent in Quebec – including platform screen doors, a control centre and 30 years of operation and maintenance.

[32] A dedicated space for wheelchair users is available, and the trains features WiFi, air conditioning and heated floors.

[35] The trains are operated and controlled at the Centre d'entretien et de contrôle du REM, close to Brossard station.