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

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

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

$521.99

In Stock

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

This DoubleStar AR-15 Upper Receiver Assembly in 300 AAC Blackout is a pin-on, ready-to-shoot top end for use with any legally registered SBR or dedicated pistol AR-15 lower receiver. The Mil-Spec 9” 4140 steel black nitride coated barrel comes equipped with 1 in 8″ twist rifling, M4 feed ramps, and a DoubleStar picatinny rail gas block. The muzzle is threaded with a 5/8″-24 pitch for easy installation of a silencer, and is topped off with an effective A2 flash hider.

The upper features a hard coat anodized A3 flat-top receiver with a DoubleStar pistol length free-floating handguard, T-Marks, forward assist, and dust cover. The The DoubleStar Upper includes a standard AR-15 semi-auto bolt carrier, properly staked gas key with MPI bolt assembly.

This 9″ 300 Blackout upper utilizes a pistol length gas system and is compatible with most subsonic and supersonic ammunition, with or without a sound suppressor in place. However, some subsonic ammunition may not always cycle reliably under adverse conditions or in a severely fouled firearm without a sound suppressor attached to provide extra backpressure.

Notes:

An “AR-15 Pistol” upper assembly has a barrel less than 16” in length. Pistol uppers are only for use on AR-15 pistol lowers and legal Short-Barreled Rifles. Other configurations may violate Federal law.

 

Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.

Specifications

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

Delivery Information

Shipping Weight 3.675 Pounds

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