AIR ARMS S400 MPR/MPR 10mm SPORTER Description
.177 cal., PCP, BA, SS, 540 FPS, 12-groove 18.63 (disc.) or 19.25 in. rifled Lothar Walther barrel, built-in pressure gauge, adj. diopter rear with globe front sights, external accessory rail, black (disc.) or nickel-plated finish, multi-adj. two-stage trigger, quick-release charging connector, lightweight ambidextrous white poplar, beech (disc. 2013), or walnut (disc. 2013) stock with adj. buttpad, adj. cheekpiece, 36.4-41.75 in. OAL, 6.8 lbs. Importation began 2007.
Beginning circa 2012, Air Arms adjusted model nomenclature and MPR (Multi-Positional-Rifle) became synonymous with the S400.