Firearm

1. A firearm comprising:

a component carrier;

a barrel having a cartridge chamber configured for accommodating a cartridge; and

a slide, which is supported on the component carrier in a longitudinally moveable manner and has a breech block for the barrel and a striking device for the cartridge;

wherein the slide bears an extractor configured for extracting a fired cartridge from the cartridge chamber;

wherein an ejector is supported on the slide in a longitudinally moveable manner, which ejector protrudes into an extraction motion path of the cartridge and, in the end phase of the rearward motion of the slide, lies against a stop formed on the component carrier; and

wherein the slide, together with the ejector, can be modularly replaced with a second slide having no ejector, wherein said stop formed on the component carrier assumes the ejector function for said second slide.

2. The firearm according to claim 1 , wherein the ejector is mounted in a modularly replaceable manner in the slide.

3. The firearm according to claim 1 , wherein the ejector has an elongated middle section, which slides on the stop, and a hook-like end section, which, in said end phase, lies against the stop.

4. The firearm according to claim 1 , further comprising a spring which loads the ejector to the back with respect to the slide.

5. The firearm according to claim 1 , wherein the barrel is a replaceable barrel.

6. The firearm according to claim 1 , wherein the barrel is a rigid barrel, which is modularly replaceable with a second barrel that can be tilted down.

7. The firearm according to claim 1 , having a housing separated into a lower part and an upper part, wherein the component carrier lies in the lower housing part and the slide forms the upper housing part.

8. A firearm comprising:

a lower part and an upper part, the upper part comprising a first slide being supported on the lower part, the first slide being longitudinally moveable with respect to the lower part, wherein the first slide includes an extractor adapted to pull out a fired cartridge from a cartridge chamber, wherein the first slide further includes an ejector supported thereon such that the ejector moves longitudinally with respect to the slide and protrudes into an extraction motion path of the cartridge and, at an end of a rearward motion of the first slide, the ejector butts up against a stop formed on the lower part as the slide continues to move rearward thereby ejecting the cartridge; wherein the first slide together with the ejector can be removed and replaced with a second slide associated with a barrel of a calibre different from the first slide and wherein the second slide does not include an ejector, wherein the stop formed on the lower part functions as the ejector for the second slide to eject a second cartridge of a different calibre than that associated with the first slide.

9. The firearm according to claim 8 , wherein the first slide is associated with a barrel of a calibre smaller than the barrel associated with the second slide.

10. The firearm according to claim 8 , wherein the ejector has an elongated middle section, which slides on the stop, and a hook-like end section, which, at an end of the rearward motion, lies against the stop.

11. The firearm according to claim 8 , further comprising a spring which loads the ejector to the back with respect to the slide.

12. The firearm according to claim 8 , further comprising a replaceable barrel.

13. The firearm according to claim 12 , wherein the replaceable barrel is a rigid barrel or a barrel that can be tilted down.

14. The firearm according to claim 8 , wherein the ejector is modularly removeable from the slide.

15. The firearm according to claim 8 , wherein the lower part includes a component carrier.

16. The firearm according to claim 15 , wherein the component carrier includes the stop.

17. The firearm according to claim 15 , wherein the component carrier supports the first and second slide.

18. The firearm according to claim 8 , wherein the first and second slide include a breech block for the barrel and a striking device for the cartridge.