AR-15 Calibers

.223 Remington

Commercial AR-15 caliber, SAAMI specification

.224 Valkyrie

AR-15 caliber designed for long-range performance

.300 AAC Blackout

.300 Blackout

Subsonic and supersonic AR-15 caliber, designed for suppressed use

.308 Winchester

Commercial AR-10 caliber, SAAMI specification

.350 Legend

AR-15 straight-wall hunting caliber

.450 Bushmaster

AR-15 straight-wall cartridge for hunting

.458 SOCOM

Large-bore AR-15 caliber for close-range power

.45 ACP

Pistol caliber carbine for AR-15 platform

5.56x45mm NATO

5.56 NATO

Standard AR-15 caliber, NATO military specification

6.5 Creedmoor

AR-10 caliber optimized for long-range precision

6.5 Grendel

AR-15 caliber optimized for long-range accuracy

6.8 SPC

6.8x43mm Special Purpose Cartridge for AR-15

6mm ARC

AR-15 caliber for precision and hunting

7.62x51mm NATO

7.62 NATO

Standard AR-10 caliber, NATO military specification

9mm Luger

9mm

Pistol caliber carbine for AR-15 platform