| 6mm AR |
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|
| Type | Centerfire rifle |
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| Place of origin | United States |
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| Designer | Robert Whitley |
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| Parent case | 6.5 Grendel |
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| Case type | Rimless, bottleneck |
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| Bullet diameter | .243 in (6.2 mm) |
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| Neck diameter | .271 in (6.9 mm) |
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| Shoulder diameter | .4323 in (10.98 mm) |
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| Base diameter | .4433 in (11.26 mm) |
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| Rim diameter | .4449 in (11.30 mm) |
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| Rim thickness | .0591 in (1.50 mm) |
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| Case length | 1.525 in (38.7 mm) |
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| Overall length | 2.260 in (57.4 mm) |
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| Case capacity | 36 gr H2O (2.3 cm3) |
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| Rifling twist | 1-8" |
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| Primer type | Small rifle |
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| Bullet mass/type |
Velocity |
Energy |
| 105 gr (7 g) Berger VLD |
2,750 ft/s (840 m/s) |
1,763 ft⋅lbf (2,390 J) |
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| Source(s): http://www.6mmbr.com/gunweek068.html |
The 6mm AR / 6x38mm AR is an intermediate centerfire wildcat cartridge initially designed by Robert Whitley for long-range performance in an AR-15 rifle.
