How many AR calibers?

[Wonder9]

How versatile is the AR platform?

5.56
.223
7.62x39
.204 Ruger
.22 LR
.450
9mm
10mm
.45 ACP
.40
5.7x28

What ones have I missed?

 

[gvnwst]

According to my calculations, you have missed about 89 different cartridges.

Here is a smaller list:

Pistol calibers:

7.62x25mm
9mm luger
10mm
40 S&W
45 ACP
5.7x28mm
.50 AE


Rifle calibers:

.17 Remington
.17 Remington Fireball
.22 Long Rifle
.20 Tactical
.204 Ruger
.221 Remington Fireball
.222 Remington
.222 Remington Magnum
5.45x39mm
5.56x45mm NATO
.223 Remington
.223 WSSM
6mm PPC
6mm-223 Remington
.243 WSSM
6.5 Grendel (.264 cal)
6.8 SPC (.270 cal)
.300 Whisper
7.62x39mm
.450 Bushmaster
.458 SOCOM
.50 Beowulf

 

[Nero_Atrum]

Nevermind, gvnwst beat me to it...

 

[wacki]

If you can fit the bullet inside the magazine well you can probably find an upper for it.

The AR-10 (.308 winchester) is a little less versatile but there are plenty of people that do custom work. So I guess the same rule applies.

 

[Seafarer12]

I have also seen AR's in the benchrest calibers like the 7mm BR.

 

[gvnwst]

Here is a more updated list. My laptop is dying right now, so i will finish it later:
Pistol calibers:
1. 7.62x25mm
2. 9mm luger
3. 10mm
4. 40 S&W
5. 45 ACP
6. 5.7x28mm
7. .50 AE



Rifle calibers:
8. .17 Remington
9. .17 Remington Fireball
10. .17 Tactical
11. .17 Mach II
12. .22 Long Rifle
13. .20 Tactical
14. .20 VAR-TARG
15. .20 PPC
16. .20 BR
17. .204 Ruger
18. .221 Remington Fireball
19. .222 Remington
20. .222 Remington Magnum
21. 5.45x39mm
22. 5.56x45mm NATO
23. .223 Remington
24. .22 PPC
25. .223 WSSM
26. .220 Russian
27. 6mm PPC
28. 6mm-223 Remington
29. .243 WSSM
30. 6mm BRX
31. 6mm BR
32. 6mm WOA
33. 6mmAR
34. 6mmAR Turbo/Turbo 40
35. 6mm Hagar
36. 6mm Whisper
37. .25 WSSM
38. .25-223
39. 6.5 Grendel
40. 6.5/243 WSSM
41. 6.5 MPC
42. 6.5 Whisper
43. 6.5 MM Whisper
44. 6.5 MM PPC (JDJ)
45. 7 MM Whisper
46. 7 MM TCU
47. 6.8 SPC
48. 7mm BR
49. .300 Whisper
50. .30 Carbine
51. .30 BR
52. 7.62x39mm
53. .30 RAR (Remington AR)
54. .338 Whisper
55. .375 Whisper
56. .375 CheyTac
57. .408 CheyTac
58. .416 Barrett
59. .450 Bushmaster
60. .458 SOCOM
61. .50 Beowulf
62. .499 LWR
63. .50 BMG
64. .50 DTC

 

[natescout]

338 federal ?

 

[jerkface11]

.338 Federal won't fit.

However I have one in .30 HRT and you can get them chambered for the WSSM calibers.