ATI ATIGAX30013ML Alpha Maxx 300 Blackout 30+1 16″ Black Threaded Barrel, Black Picatinny Rail Polymer Receiver, 13″ Polymer Handguard, ATI MM4 Black Synthetic Stock, Black Polymer Grip, Right Hand

$440.32

Get the ATI ATIGAX30013ML Alpha Maxx .300 Blackout rifle with a 16-inch threaded barrel, 30+1 capacity, and lightweight polymer build for under $400. Perfect for home defense, hunting, or plinking with both subsonic and supersonic loads.

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SKU: TSW|177749 Category:

Description

The ATI ATIGAX30013ML Alpha Maxx in .300 Blackout is a purpose-built AR rifle that delivers a 30+1 capacity and a 16-inch black threaded barrel, housed in a black Picatinny rail polymer receiver with a 13-inch polymer handguard, ATI MM4 black synthetic stock, and black polymer grip for right-handed shooters. This configuration offers a lightweight, durable platform for subsonic and supersonic loads, making it a practical choice for home defense and hunting applications.

Manufacturer ATI (American Tactical Imports)
Model Alpha Maxx
Caliber .300 Blackout
Magazine Capacity 30+1
Barrel Length 16 inches
Barrel Twist 1:8 (per manufacturer specs)
Thread Pattern 5/8×24 (standard .300 BLK)
Handguard 13-inch polymer M-LOK
Receiver Material Polymer with Picatinny rail
Stock ATI MM4 Black Synthetic
Grip Black Polymer
Hand Orientation Right
Finish Black
Weight Approximately 6.8 lbs (per manufacturer specs)
Condition New

Key Features

  • Polymer M-LOK Handguard — Why it matters: This 13-inch guard reduces overall weight while allowing direct attachment of lights, grips, and bipods without extra rails, keeping your setup streamlined.
  • Threaded 16-Inch Barrel — Why it matters: The 5/8×24 threads let you mount a suppressor or muzzle brake for .300 Blackout subsonic loads, cutting noise and recoil for a more manageable shooting experience.
  • 30-Round Magazine Capacity — Why it matters: With 30+1 rounds on tap, you maintain sustained firepower for defensive scenarios or hog hunting without constant reloads.
  • Flip-Up Sights Included — Why it matters: Back-up iron sights come ready out of the box, giving you immediate aiming capability while you decide on optics.
  • ATI MM4 Stock — Why it matters: The six-position adjustable stock lets you tailor length of pull for different body types or layered clothing, improving control and comfort.

Who It’s For

This rifle suits the traditional shooter who wants a .300 Blackout without breaking the bank. It works for the hunter stalking whitetail in thick cover, the home defender needing a compact but legal barrel, or the plinker who enjoys the versatility of swapping between supers and subs. The polymer construction appeals to those who value light weight over aluminum receivers, especially for all-day carry.

Pros & Cons

  • Pros: Lightweight polymer build reduces fatigue; threaded barrel accepts standard suppressors; 30-round capacity for extended sessions; flip-up sights eliminate need for immediate optic purchase; affordable price point under $400.
  • Cons: Polymer receiver may not withstand the same abuse as forged aluminum; heavy use could lead to rail flex under extreme loads; aftermarket trigger upgrades are limited compared to mil-spec lowers.

Comparison

Feature ATI Alpha Maxx .300 BLK Zev Technologies OZ9C Geissele Super Duty
Caliber .300 Blackout 9mm 5.56 NATO
Barrel Length 16 inches 4.5 inches (pistol) 16 inches
Receiver Material Polymer Aluminum Aluminum
Weight 6.8 lbs ~1.8 lbs ~7.2 lbs
MSRP $393.14 $1,500+ $1,800+
Best For Budget .300 BLK rifle Competition pistol Duty-grade AR

FAQ

Is this rifle compatible with standard AR-15 parts?

Yes, the ATI Alpha Maxx uses a standard AR-15 lower receiver pattern, so triggers, grips, and stocks will swap. The upper is specific to .300 Blackout but fits standard AR-15 lowers.

What twist rate does the barrel have?

Per ATI specs, the 16-inch barrel uses a 1:8 twist, which stabilizes both 110-grain supersonic and 220-grain subsonic .300 Blackout rounds effectively.

Can I mount a suppressor directly?

Yes, the barrel is threaded 5/8×24, the standard pattern for .300 Blackout. You just need a compatible suppressor and possibly a muzzle device adapter.

Does the polymer receiver hold up to high round counts?

For typical use—a few hundred rounds per year—it’s fine. For high-volume shooters, aluminum receivers may last longer, but the polymer here reduces weight and cost.

Last updated: April 2026

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