This complete rifle kit includes:
Black Upper Receiver with ejection port door and forward assist installed.
Available with your choice of a 7", 10", 12" or 15" Inch 3 sided One piece slim design handguard.
Handguard is lightweight and measures 1-3/8 x 1-11/16 In Diameter
All are Made from 4150 Chrome Moly Vanadium