This Andro Corp Industries 300 Blackout upper (Andro Corp part no. U3008ML) is a complete AR-15 upper built specifically around the .300 AAC Blackout cartridge, with an 8-inch barrel sized for compact pistol- and SBR-length builds. Andro Corp machines the receiver from 7075-T6 mil-spec aluminum and applies a QPQ corrosion-resistant finish, then pairs it with a 4150 chrome-moly-vanadium barrel treated with a Melonite coating for durability under sustained use. A pistol-length gas system with a .750-inch low-profile gas block keeps the action running reliably at the shorter barrel length, and the slim M-LOK handguard leaves room for lights, grips, and other accessories. It ships complete with a full-auto-rated M16 bolt carrier group and charging handle, so it’s ready to drop onto a compatible AR-15 lower.

Key Specifications

• Chambered in .300 AAC Blackout for effective performance from a short barrel.
• Barrel measures 8 inches, sized for compact pistol and SBR-length builds.
• Barrel is built from 4150 chrome-moly-vanadium steel for strength and heat resistance.
• Coated with Melonite for corrosion resistance and reduced friction.
• Cut with a 1:7 twist rate to stabilize heavier .300 Blackout subsonic loads.
• Runs a pistol-length gas system with a .750-inch low-profile gas block.
• Receiver is machined from 7075-T6 mil-spec aluminum for a durable, lightweight platform.
• Finished with a QPQ corrosion-resistant coating for long-term durability.
• Fitted with a slim M-LOK handguard for mounting lights, grips, and accessories.
• Includes a full-auto-rated M16 bolt carrier group and charging handle, ready to install.

Frequently Asked Questions

Does this upper come with a bolt carrier group and charging handle? Yes, it ships complete with a full-auto-rated M16 BCG and a charging handle installed.

What caliber is this upper chambered for? .300 AAC Blackout, built around an 8-inch barrel for compact builds.

What kind of handguard does it use? A slim M-LOK handguard for mounting lights, foregrips, and other accessories.

Buy the Andro Corp Industries 300 Blackout Upper

Build a compact, hard-hitting 300 Blackout upper without sourcing a barrel, BCG, and handguard separately. This Andro Corp Industries upper comes complete and ready to install from our AR15 uppers selection, shipped direct from our Lubbock, Texas gun shop.