http://www.olyarms.com/new.html 30 Carbine AR, 223 WSSM, 243 WSSM Magnum Rifle and a quick disconnect stock on a AO98 Carbine. Those Winchester WSSM seem like they might have to much steam for a standard AR 15 action check the ballistics out on them. 223 WSSM 55gr. B.Tip. 4060fps. muzzle, 243 WSSM 95gr. B.Tip. 3250fps. muzzle. figures are probably from a 24"-26" tube.