Use of the acquired capability for suicide scale (ACSS) among United States military and Veteran samples: A systematic review

•United States military personnel and Veterans are at increased risk for suicide.•Acquired capability for suicide (AC) may be a mechanism that explains this risk.•We systematically reviewed the literature to determine factors associated with AC.•Results yielded an empirical base characterized by a high risk of bias.•AC construct assessment and refinement are suggested as future research targets.