| FIR | chamber that is the part of a gun that receives the charge |
|---|---|
| FIR | the most advanced and responsible group in an activity |
| FIR | the line from which soldiers deliver fire |
| FIR | the action that ignites the charge in a firearm |
| FIR | the act of discharging a gun |
| FIR | a squad formed to fire volleys at a military funeral or to carry out a military execution |
| FIR | striker that ignites the charge by striking the primer |
| FIR | a practice range for target practice |
| FIR | a squad formed to fire volleys at a military funeral or to carry out a military execution |
| FIR | a small wooden keg |
| FIR | a British unit of capacity equal to 9 imperial gallons |
| FIR | members of a business organization |