Bushmaster AR-15 XM-15 QRC Upper Receiver Assembly 5.56x45mm NATO 16″ Barrel Nitride

Cartridge
5.56x45mm NATO
Color
Black
Finish
Anodized
Material
Aluminum
Barrel Length
16 Inches
Twist
1:8 Inches
Threads
1/2″-28
Barrel Finish
Black Nitride
Gas Block Diameter
0.75 Inches
Gas System Length
Carbine
M4 Feed Ramps
Yes
Upper Receiver Type
A3 Flat-Top
Barrel Material
Steel
Handguard
A2
Bolt Carrier Assembly Included
Yes
Muzzle Device
A2 Flash Hider
Country of Origin
United States of America
Compatible With
AR-15