This chapter will focus on the platoon-level weapons systems utilised by Australian infantry on the Western Front from 1916–18. The introduction and use of these weapons occurred in concert with organisational and training developments that were concurrently occurring throughout the British Expeditionary Force (BEF). The weapon systems were in every sense the platoon-level tools of the trade during the Great War. Developments in their tactical application evolved significantly after the Somme campaign of 1916. In particular, the British and Imperial platoon weapons systems of 1916–18 comprised the rifle, bayonet, light machine-gun (LMG), grenade and grenade launcher. All of these weapons were used by the Australian infantry platoon and its subordinate elements, the section, in the last two years of the Great War. This chapter will focus on the technical detail associated with each system, and in particular the schooling systems in which Australian infantrymen learnt to operate and maintain their various weapons. This chapter will not discuss high-end weapons systems or combined arms operations – tanks, aircraft, artillery and the like – other than in the wider context of the development of infantry tactics.