The Winchester Model 1907 is a semi-automatic rifle chambered in .351SL (self-loading) that was produced in the United States from 1906 to 1957. During World War I, the weapon was ordered in various numbers by the US, French, British and Imperial Russian armed forces.
— In-game description
The M1907 SL is a weapon featured in Battlefield 1. Unlike many of the weapons of the period, the M1907 uses detachable magazines, allowing for fairly quick and complete reloading. An extra round can be kept in the chamber during a partial reload, reducing downtime.
The M1907 SL is one of several weapons that equip the Harlem Hellfighters in the campaign's opening chapter, Storm of Steel. The American infantry use the Factory version, in addition to another variant with modified iron sights. Some are also seen using the Rifle Grenade attachment.
Three variants are featured in multiplayer for the Medic kit: Factory, Sweeper, and Trench.
Compared against other rifles the M1907 is tuned for closer engagements, with a larger magazine and better hipfire. It has lower range, with a steeper damage ramp and more drag/drop in flight. When using the TR preset, the weapon appears to gain more hipfire accuracy to compensate for only having semi-automatic fire.
The M1907 SL Factory is the base variant of the weapon. It is equipped with a bayonet.
The M1907 SL Sweeper has the option for fully automatic fire in addition to semi-automatic operation. Its attachments include a foregrip and a bayonet.