The GSR Presumptive Detection Kit is designed for rapid field screening to detect the possible presence of gunshot residue (GSR). It is used to examine hands, clothing, and surfaces for residues produced during firearm discharge. The kit provides quick preliminary results, helping investigators determine whether a person may have recently fired or handled a firearm. Presumptive tests are simple to perform and suitable for on-site use. While not confirmatory, the results help guide further laboratory analysis. This kit is a valuable tool during the early stages of firearm-related investigations and assists in suspect screening and scene assessment.