| Term | Definition | Category |
| RASP | Raspberry | Finish |
| RASP | Rasberry Grips | Grip |
| RBL | Rebuilt | Item Description |
| RBN | Robins Egg Blue | Finish |
| RC | Range Certified | Item Description |
| RD | Red Dot | Item Description |
| R-DOT | Red Dot | Accessory |
| RDTGS | Red Tiger Stripe | Finish |
| RED | Red or Red Anodize | Finish |
| REM | Remington | Brand |
| REP | Retailer Exclusives Program | Item Description |
| RET | Reticle Type | Accessory |
| REV | Revolver | Handgun |
| RFD | Redfield | Brand |
| RFL | Rifle | Item Description |
| RFLD | Rifled | Ammunition |
| RH | Right Hand | Accessory |
| RL | Top Rail | Item Description |
| RL | Reduced Length | Stock |
| RM | Rollmarked | Item Description |
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