| Term | Definition | Category |
| 5.56 | 5.56 NATO | Caliber, Ammunition |
| 5.7 | 5.7MM | Caliber, Ammunition |
| 500 SW Magnum | 500 S&W Magnum | Caliber, Ammunition |
| 500NE | 500 Nitro Express | Caliber, Ammunition |
| 500S&W | 500 Smith &Wesson Magnum | Caliber, Ammunition |
| 500SW | 500 Smith & Wesson Magnum | Caliber, Ammunition |
| 50-90BPCR | 50-90 Black Powder Cartridge Rifle | Caliber, Ammunition |
| 50AE | 50 Action Express | Caliber, Ammunition |
| 50BMG | 50 Browning Machine Gun | Caliber, Ammunition |
| 50BP | 50 Black Powder | Caliber, Ammunition |
| 50BP/12 | 50 Black Powder / 12 Gauge | Caliber, Ammunition |
| 50CA/50 BLKPWDR | 50 Black Powder | Caliber, Ammunition |