6mm AR
| 6mm AR |
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| Type |
Centerfire rifle |
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| Place of origin |
 United States |
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| Production history |
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| Designer |
Robert Whitley |
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| Specifications |
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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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| Ballistic performance |
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| Bullet weight/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 is a centerfire wildcat cartridge designed by Robert Whitley[1] for long-range performance in an AR-15 rifle. The cartridge uses a 6.5 Grendel case that has been necked-down to accept a 6 mm (.243 in.) bullet.
The 6mm AR takes advantage of the wide variety of .243 in caliber bullets. Slim, long bullets with high ballistic coefficient are ideal for energy retention at long ranges.[2]
See also
References
- ↑ http://www.6mmbr.com/gunweek068.html
- ↑ http://6mmar.com/6mm_AR_Loading_Info.html
Cartridges derived from the 7.62×39mm or its derivatives |
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| | First generation derivatives | | |
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| | Second generation derivatives (based on 5.6х39mm/.220 Russian) | |
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| | Third generation derivatives (based on 6.5mm Grendel) | |
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