I currently have ARs with .22lr, 5.56, 7.62X39 and 7.62 NATO calibers. What are all the calibers for "off the rack" ARs that can be added to this list?
.17 HMR
5.54x39
5.56
.223
.204 Ruger
.222 Remington
.222 Remington Magnum
.243 Win
6.8 SPC
7mm-08 Remington
.300 Whisper (.300/221, .300 Fireball)
9mm
10mm
.45
.17 HMR
5.54x39
5.56
.223
.204 Ruger
.222 Remington
.222 Remington Magnum
.243 Win
6.8 SPC
7mm-08 Remington
.300 Whisper (.300/221, .300 Fireball)
9mm
10mm
.45