minus-squaretechgundam@forum.guncadindex.comtoGeneral Discussion@forum.guncadindex.com•AR15 and M4 rifling buttonslinkfedilinkEnglisharrow-up2arrow-down1·4 months agoAR15 is a platform that canbe used for many calibers. .223 and 5.56 are the most common however. linkfedilink
AR15 is a platform that canbe used for many calibers. .223 and 5.56 are the most common however.