Collaborative Testing Services, Inc. 
P.O. Box 650820, Sterling, VA, USA 20165-0820 1-571-434-1925
The Firearms and Toolmarks discipline includes the comparison of bullets and cartridge cases found at crime scenes to suspect firearms, as well as distance and angle determinations and serial number restorations. Also within this discipline, toolmark examiners can determine if a toolmark left at a scene was produced by a particular suspect tool. CTS offers the greatest variety of proficiency tests to meet the diverse needs of the firearms and toolmarks community and works with that community to create casework-like samples that challenge examiners and assess their performance.
| 5250 Serial Number Restoration | ships | March |
| 5301/5305 GSR Distance Determination | ships | April |
| 5281 Toolmarks Examination | ships | January |
| 5261 Firearms Examination | ships | May |
| 5251 Serial Number Restoration | ships | July |
| 5620 Shooting Reconstruction: Angle Determ. | ships | August |
| 5282 Toolmarks Examination | ships | September |
| 5306/7 Shotgun Distance Determination | ships | October |
| 5262 Firearms Examination | ships | October |
Manufacturer's Information reports for all Firearms & Toolmarks tests can be found on the CTS Customer Portal.
