Parts commonality between SCAR-L and SCAR-H is astonishing 90%. Barrels are quick-detachable, and held in the upper receiver with two cross-bolts. Barrel change procedure requires minimum amount of tools, takes just several minutes and there is no need to adjust the headspace after the change...
Notable series variants as part of the Fabrique Nationale FN SCAR (Mk 16 / Mk 17) Modular Automatic Assault Rifle family line. Mk 16 - Chambered for the 5.56x45mm NATO cartridge; firing from a 30-round STANAG style magazine. Mk 17 - Chambered for the 7.62x51mm NATO cartridge; firing fro...