GSI Cheat Sheet 2026

The 30 highest-yield GSI facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. In Gun Safety Instructor practice, what is the CORRECT sequence when performing a technical procedure? → Plan, prepare, execute, verify, and document
2. In Gun Safety Instructor practice, what is the FIRST step when a safety hazard is identified in the workplace? → Immediately secure the area and report the hazard
3. Which risk management approach is MOST effective for GSI professionals when evaluating potential workplace hazards? → Proactive hazard identification and assessment
4. In Gun Safety Instructor, what is the PRIMARY purpose of conducting regular safety drills and exercises? → To ensure personnel can respond effectively in emergencies
5. In Gun Safety Instructor practice, what is the CORRECT sequence when performing a technical procedure? → Plan, prepare, execute, verify, and document
6. Which grip error most commonly causes shots to group low and to the left for a right-handed shooter? → Heeling — pushing the gun forward in anticipation of recoil
7. How should firearms be stored safely? → Unloaded and locked
8. How should ammunition be stored to maintain reliability and safety? → In a cool, dry location away from heat sources and moisture
9. What does the term 'caliber' refer to when describing ammunition? → The diameter of the bullet or bore in inches or millimeters
10. Why is it important for a GSI instructor to teach students to match ammunition to the firearm's marked caliber? → To prevent dangerous chamber pressure spikes and potential firearm failure
11. Who should you notify during an emergency? → Emergency services
12. What is the BEST way for a Gun Safety Instructor professional to stay current with regulatory changes? → Monitor regulatory bodies, attend CE, and participate in professional associations
13. What is the PRIMARY reason for regulatory compliance in the Gun Safety Instructor profession? → To protect public safety, ensure quality, and maintain professional integrity
14. What is the function of a ballistic coefficient (BC) for a bullet? → It describes how efficiently a bullet overcomes air resistance in flight
15. Which propellant type is used in modern centerfire cartridges? → Smokeless powder
16. Which personal protective equipment (PPE) principle applies to ALL GSI certified professionals regardless of their specific role? → PPE must be properly fitted, maintained, and replaced as needed
17. What firearm component should a GSI instructor emphasize cleaning regularly to prevent misfires? → The firing pin and firing pin channel
18. What documentation is MOST critical to maintain for safety compliance in the Gun Safety Instructor field? → Incident reports, training records, and inspection logs
19. Before cleaning any firearm, what is the first mandatory safety step? → Verify the firearm is unloaded and the action is open
20. How should a GSI instructor address a student who is flinching in anticipation of recoil? → Use ball-and-dummy drills to help the student identify and correct the flinch response
21. How does feedback improve learning? → Guides progress & improvement
22. Which documentation practice BEST demonstrates regulatory compliance for GSI certified professionals? → Maintaining organized, dated, and signed records of all activities
23. In Gun Safety Instructor practice, what is the FIRST step when a safety hazard is identified in the workplace? → Immediately secure the area and report the hazard
24. What is the purpose of the crimp on a completed cartridge? → To secure the bullet in the case mouth and ensure consistent powder ignition
25. What is the purpose of applying gun oil or lubricant after cleaning a firearm? → To reduce friction between moving parts and protect metal surfaces from corrosion
26. A student consistently shoots a tight group but displaced from center. What is the most likely cause? → Consistent sight misalignment or an improperly zeroed firearm
27. What is formative assessment? → Ongoing assessment
28. How should Gun Safety Instructor professionals handle procedures that have been updated or revised? → Review updates, complete required training, and implement revised procedures
29. Which type of bullet is typically recommended for practice and target shooting due to its cost and clean barrel performance? → Full metal jacket (FMJ)
30. When should you keep your finger off the trigger? → Until ready to fire