Designed to meet Customer's needs, the AR-STONER AR-15 A3 Upper Receiver Assembly provides function, style and affordability for today’s AR-15. The A3 upper attaches to virtually any standard AR-15 lower receiver and comes complete with everything you need to start shooting. 
Product Information
Cartridge
5.56x45mm NATO
Finish
Matte Black
Material
Aluminum
Weight
5.2 Pound
Barrel Length
20 Inches
Twist
1:7 Inches
Threads
1/2"-28
Barrel Contour
Heavy
Sights
Yes
Barrel Finish
Parkerized
Chrome Lined
No
Gas Block Diameter
0.75 Inches
Gas System Length
Rifle
M4 Feed Ramps
Yes
Upper Receiver Type
A3 Flat-Top
Barrel Material
4150 Chrome Moly Vanadium Steel
Handguard
2-Piece M4 Style
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