The ATI Alpha Maxx (brand part no. ATIGAX3009ML) is a right-hand AR-15 chambered in .300 AAC Blackout, built around a 16-inch black threaded barrel for reliable performance with both subsonic and supersonic loads. A polymer M-LOK handguard over a Picatinny-railed polymer receiver keeps the rifle light without sacrificing accessory mounting space, and flip-up front and rear sights come standard for use without an optic. The ATI MM4 synthetic stock and polymer grip round out a straightforward, accessory-ready rifle built for range use, hunting, or home defense.

Key Specifications

• Chambered in .300 AAC Blackout, a versatile round for both suppressed and standard use.
• Built around a 16-inch black threaded barrel.
• Rifled with a 1:8 twist matched to common .300 Blackout bullet weights.
• Threaded 5/8×24 at the muzzle for suppressors or muzzle devices.
• Feeds from a 30+1 capacity magazine.
• Fitted with a 9-inch polymer M-LOK handguard for accessory mounting.
• Uses a Picatinny-railed polymer receiver to keep overall weight down.
• Equipped with flip-up front and rear sights for use without an optic.
• Rides on an ATI MM4 black synthetic stock and matching polymer grip.
• Ships at approximately 8.35 pounds in its case.

Frequently Asked Questions

Is the barrel threaded for a suppressor? Yes, it uses a 5/8×24 thread pattern compatible with common .30-caliber suppressors and muzzle devices.

Does it come with sights? Yes, it ships with flip-up front and rear sights ready to use without mounting an optic.

What is the receiver made of? A polymer receiver with an integrated Picatinny rail, keeping the rifle lightweight.

Buy the American Tactical Alpha Maxx Rifle

Order the ATI Alpha Maxx in .300 AAC Blackout from our Lubbock, Texas gun shop for fast, insured shipping to your local FFL. American Tactical built the Alpha Maxx as a lightweight, accessory-ready AR-15, part of our full semi-auto rifles lineup.