AR-STONER AR-15 A3 Billet Upper Receiver Assembly 5.56x45mm NATO 16″ Barrel with 15″ Ultralight M-Lok Handguard

Cartridge
5.56x45mm NATO
Color
Matte Black
Finish
Anodized
Material
Aluminum
Weight
4.12 Pound
Barrel Length
16 Inches
Twist
1:7 Inches
Threads
1/2″-28
Barrel Contour
M4
Sights
No
Barrel Finish
Melonite Black
Chrome Lined
No
Gas Block Diameter
0.75 Inches
Gas System Length
Carbine
M4 Feed Ramps
Yes
Upper Receiver Type
A3 Flat-Top
Barrel Material
Chrome Moly Steel
Handguard
Ultralight M-Lok
Bolt Carrier Assembly Included
Yes
Muzzle Device
Flash Hider
Mil-Spec or Commercial
Mil-Spec
Country of Origin
United States of America
Compatible With
AR-15