Bryan Wang Member Rating - 100% 63 0 0 Apr 29, 2020 #1 Couldn't find with search function. does it work only with MDI upper or any mil spec upper? thanks!
jiffx2781 CGN Ultra frequent flyer EE Expired Rating - 100% 24 0 0 Location Onterrible Apr 29, 2020 #2 They are not interchangeable.
