For sale are 2 olympic arms 45 acp ar 15 mags. To be used in standard ar lowers with compatible 45 acp uppers. Used in standard lowers for with their 45 acp upper. These are 18 rounders. My upper to is on a bazoka brothers lower and are no longer needed. These are used but in excellent condition. Listed here first in because these are difficult to find it seems. $80.00 plus shipping for both.