Figured everybody here already knew. But if you were even thinking about a 22 upper for your AR, or have a sig 522, or any of the other AR mag style 22's. probably want to stock up on these before we can't....

Stainless lips
http://palmettostatearmory.com/index...f-26sm-ss.html

nylon lips
http://palmettostatearmory.com/index...f-26sm-ny.html