On a side-note, I like to build ARs, so I have too many of them in standard .223/5.56, 1 converted .22 with the drop in kit, 2 in 300 BO, 2 in 7.62X39, 1 in a dedicated .22 upper and then 3 other lowers fully built but just waiting for me to decide what caliber I want to add into the mix, haha...