The initial SAINT offering was an AR-15 style rifle with a 16-inch (410 mm) barrel and chambered in 5.56 NATO, introduced in November 2016.
[8] The rifle offering was updated in July 2019 with an M-LOK compatible handguard and optional flip-up front sight,[9] while a refreshed pistol debuted in October 2019.
[10] The SAINT Edge variant was introduced in mid-November 2017, featuring a modular trigger system, mid-sized charging handle, and muzzle brake.
[16][17][18] Users of the SAINT have also noted older variants with an enhanced M16 bolt carrier group and no sights.
As of May 2020[update], there are 24 total variants listed on the Springfield Armory website: The following chamberings have been made available: Items in italics have been discontinued.