DoubleStar AR-15 Pistol A3 Upper Receiver Assembly 300 AAC Blackout 9″ Barrel 1 in 8″ Twist

Cartridge
300 AAC Blackout (7.62x35mm)
Material
Aluminum
Barrel Length
9 Inches
Twist
1:8 Inches
Threads
5/8″-24
Barrel Contour
Medium
Sights
No
Barrel Finish
Black Salt Bath Nitride
Chrome Lined
No
Gas Block Diameter
0.75 Inches
Gas System Length
Pistol
M4 Feed Ramps
Yes
Upper Receiver Type
A3 Flat-Top
Barrel Material
4140 Chrome Moly Steel
Handguard
Pistol Length, 6061-T6 Aluminum, Free Floating
Bolt Carrier Assembly Included
Yes
Muzzle Device
A2 Flash Hider
Mil-Spec or Commercial
Commercial
Compatible With
AR-15