DoubleStar AR-15 Pistol A3 Upper Receiver Assembly 300 AAC Blackout 7.5" Barrel 1 in 8" Twist

  • Product #: 274683
  • Manufacturer #: ARBU240C
  • UPC #: 841348104797
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DoubleStar AR-15 Pistol A3 Upper Receiver Assembly 300 AAC Blackout 7.5" Barrel 1 in 8"...
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List price was $639.99 our price $575.99
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Only 1 in stock - order soon!
Ships tomorrow from MidwayUSA
Cartridge: 300 AAC Blackout (7.62x35mm)
Barrel Length: 7.5 Inches
Twist: 1:8 Inches
Gas System Length: Pistol

Product Overview

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 7.5” 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 7.5" 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.


Compatible w/standard AR-15 magazines, including Magpul Pmags (Not Included)

 

Note

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

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NOTE: Prices, specifications and availability are subject to change without notice. We reserve the right to correct typographic, photographic and/or descriptive errors.