6mm AR
Type Centerfire rifle
Place of origin22x20px United States
Production history
DesignerRobert Whitley
Parent case6.5 Grendel
Case typeRimless, bottleneck
Bullet diameter.243 in (Bad rounding hereScript error mm)
Neck diameter.271 in (Bad rounding hereScript error mm)
Shoulder diameter.4323 in (Bad rounding hereScript error mm)
Base diameter.4433 in (Bad rounding hereScript error mm)
Rim diameter.4449 in (Bad rounding hereScript error mm)
Rim thickness.0591 in (Bad rounding hereScript error mm)
Case length1.525 in (Bad rounding hereScript error mm)
Overall length2.260 in (Bad rounding hereScript error mm)
Case capacity36 gr H2O (Bad rounding hereScript error cm3)
Rifling twist1-8"
Primer typeSmall rifle
Ballistic performance
Bullet weight/type Velocity Energy
105 gr (Script error g) Berger VLD 2,750 ft/s (Bad rounding hereScript error m/s) 1,763 ft·lbf (Bad rounding hereScript error J)

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 alsoEdit

References Edit


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