DEAP-3600 (Dark Matter Experiment using Pulse Shape Discrimination) is a direct detection dark matter detector located at SNOLAB in Lively, Ontario. DEAP uses ~3.3 tonnes of liquid argon as its target volume that is housed in a acrylic sphere. In this discussion, I will highlight the technique used to perform a low mass WIMP search with DEAP followed by the expected sensitivity. I will include a brief overview of how the detector works, discuss results that were taken with the nominal DEAP threshold, which will lead into a description of the low mass WIMP search. The differences in how to approach low mass data compared to nominal data will be presented, leading into a showcase of the difference between low threshold data and nominal data. The expected sensitivity of the low mass WIMP search will then be discussed.