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

Cartridge
5.56x45mm NATO
Finish
Matte Black
Material
Aluminum
Weight
4.45 Pound
Barrel Length
16 Inches
Twist
1:8 Inches
Threads
1/2″-28
Barrel Contour
Medium
Sights
No
Barrel Finish
Matte
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
Steel
Handguard
M-LOK
Bolt Carrier Assembly Included
Yes
Muzzle Device
A2 Flash hider
Mil-Spec or Commercial
Mil-Spec
Country of Origin
United States of America
Compatible With
AR-15