ArmaLite AR10 NM Upper Receiver Assembly

This Armalite AR10 NM Upper Receiver Assembly is similar to the AR10 B Series upper receivers with the exception of the top section where the charging handle goes in there is a dime size cut out on the flat surface to allow for a longer sight base for national match shooters.*Compatible with Armalite AR-10® B-Series lowers. Armalite AR10 (NM) Upper Receiver Assembly. MPN 10002005