Table 1.

Inclusion and exclusion Criteria as defined by Population, Concept, and Context (PCC) framework[11].

	Inclusion criteria	Exclusion criteria
Population	Any individual (all ages) or group that have been a victim of firearm violence. Some examples include gun owners, public, third parties such as gun businesses, and police. We will also include studies that evaluate specific populations (e.g., Indigenous populations, racial/ethnic minorities, individuals with disabilities).	N/A
Concept	KQ1) The impact of firearm legislation on rates of suicide, domestic violence, homicide, and mass shootings in different populations, disease states, and/or environmental exposures. Firearm-related death by suicide, homicide, gun injuries associated with non-fatal suicide attempt, non-fatal homicide attempt will be included. KQ2) Any factors that have been evaluated for their impact on legislation uptake or implementation. We will define factors by any of the five domains outlined in the Consolidated Framework for Implementation Research. Some examples of factors may include, but are not limited to, cost, local firearm ideology, or law enforcement culture. Firearm legislation will be limited to local and federal laws, policies, and regulations for both KQs.	Initiatives led by industry or any non-governmental organization (NGO). Any study evaluating accidental firearm injury.
Context (Setting)	Urban, rural, and remote settings internationally.	N/A
Study designs	Any experimental or observational study design (e.g., RCTs, quasi-randomized, controlled clinical trials, cohort studies, case-control, cross-sectional, time-series) and systematic reviews.Any relevant grey literature sources (e.g., government reports) and preprints.	Case reports, case series, narrative reviews, editorials, news articles, commentaries, letters, and conference proceedings.
Language	English	N/A
Dates of publication	No date limitations.	N/A