AR-STONER AR-15 A3 Upper Receiver Assembly 450 Bushmaster 18″ Barrel with 15″ M-Lok Handguard

Cartridge
450 Bushmaster
Finish
Matte Black
Material
Aluminum
Weight
4.91 Pound
Barrel Length
18 Inches
Twist
1:24 Inches
Threads
5/8″-32
Barrel Contour
Heavy
Sights
No
Barrel Finish
Matte
Chrome Lined
No
Gas Block Diameter
0.875 Inches
Gas System Length
Mid-Length
M4 Feed Ramps
Yes
Upper Receiver Type
A3 Flat-Top
Barrel Material
Steel
Handguard
15″ M-LOK
Bolt Carrier Assembly Included
Yes
Mil-Spec or Commercial
Mil-Spec
Country of Origin
United States of America
Compatible With
AR-15