| Term | Translation | Definition |
| ramp | Kornsattel | ... |
| range of fire | Schussweite, Schussentfernung
| The distance from the point of departure to the target (point of impact)... |
| rate of fire | | ... |
| rear sight slide | Einstelltrommel
| ... |
| rear sight, backsight | Visier, Visiereinrichtung | ... |
| reassembly | | ... |
| recapper, recapping device | | ... |
| receiver (boxlock action) | Basküle | ... |
| receiver cover | | ... |
| receiver, breechcasing | Verschlussgehäuse, Kammer
| ... |
| recoil | | ... |
| recoil spring guide rod | | ... |
| recoil spring, return spring | Rückholfeder, Vorholfeder
| ... |
| release (the safety) | | ... |
| reloading press | | ... |
| reloading, handloading cartridges | | ... |
| repeating firearm | | ... |
| repeating rifle | | ... |
| repeating shotgun | | ... |
| retainer | Sperrbolzen | ... |
| retainer screw | | ... |
| retainer spring | Sperrbolzenfedei
| ... |
| retarder | Verzögerungseinrichtung
| ... |
| retarder spring | Feder der Verzögerungseinrichtung | ... |
| reticle | Absehen | ... |
| ricochet, keyhole | | ... |
| rifle, carbine | Buchse, Karabiner, Gewehr
| Long gun with one rifled barrel.... |
| rifle-grenade | | ... |
| rifle-shotguns, combination guns | Kombinationswaffen
| Long guns with two or more barrels, with at least one rifling barrel and one smoothbore barrel.... |
| rifled barrel | Kugellauf
| Gun barrel with rifling.... |
| rifled firearms, rifled guns | Kugelschusswaffen | ... |
| rim | Hülsenrend
| ... |
| rimfire cartridge, rime-fire cartridge | Randfeuerpatrone
| The priming compound of the rimfire cartridge is located in the rim of the cartridge case and not in the centre as with centerfire cartridges. An...... |
| rimless case | randlose Patronenhülse
| It has no rim projecting past the edge of the case, the extractor groove is of the same diameter as the base of the case... |
| room entry | | ... |
| round ball | Rundkugelgeschoss | ... |
| rubber bullet | | ... |
| rubber recoil pad | Gummischaftkappe | ... |
| rust | | ... |
