ATI Alpha Maxx HGA Pistol — 5.56 NATO, 7.5″ Barrel, 60+1

Description

The ATI Alpha Maxx HGA Pistol — 5.56 NATO, 7.5″ Barrel, 60+1 is a compact AR-style pistol built with a polymer upper and lower receiver, chambered for .223 REM / 5.56 NATO. It features a 7.50″ threaded steel barrel, a 7.00″ M-LOK handguard, flip-up sights, and ships with a 60-round window magazine and a rear blade brace. Overall length is 22″, making it a tight package for high-capacity carry.

Specifications

Manufacturer	American Tactical Imports (ATI)
Model	Alpha Maxx HGA
Material	Polymer upper and lower receivers, steel barrel
Compatibility	.223 REM / 5.56 NATO ammunition
Finish	Black anodized barrel, black polymer furniture
Weight	4.9 lbs (per manufacturer specs)
Condition	New

Key Features

• 7.5″ Threaded Steel Barrel — The 1:7 twist rate stabilizes both .223 and 5.56 loads, and the threaded muzzle accepts standard flash hiders or suppressors for reduced recoil and noise.
• 60-Round Window Magazine — Clear window lets you see remaining rounds at a glance, and the high capacity means fewer reloads during range sessions or defensive drills.
• M-LOK Handguard — The 7.00″ free-float handguard allows you to mount lights, grips, or lasers directly, keeping the platform slim and customizable.
• Flip-Up Front and Rear Sights — Low-profile sights deploy instantly for iron-sight shooting and fold flat when not in use, preserving your optic mount space.
• Rear Blade Brace — Provides a stable cheek weld and shoulder contact point for better control during rapid fire, without adding the bulk of a full stock.

Who It’s For

This pistol suits the shooter who wants a compact, high-capacity platform for truck, backpack, or home defense. It’s also a solid choice for plinkers who appreciate the convenience of 60+1 rounds without swapping mags.

Pros & Cons

• Pro: Lightweight polymer build keeps the overall weight under 5 lbs for easy one-handed carry.
• Pro: High-capacity magazine included — saves you $40–60 over buying separately.
• Con: The polymer upper receiver may not accept all aftermarket handguards or rails without modification, so check compatibility before upgrading.

Comparison

Feature	ATI Alpha Maxx HGA	Zev Technologies OZ9	Agency Arms AAR-15
Caliber	.223 REM / 5.56 NATO	9mm	.223 REM / 5.56 NATO
Barrel Length	7.5″	4.5″	7.5″
Capacity	60+1	15+1	30+1
Frame Material	Polymer	Aluminum	Aluminum
Price	$362.17	$1,200+	$1,800+
Included Brace	Rear blade brace	None	None

The ATI Alpha Maxx HGA offers a lower price point and higher capacity than the Zev and Agency options, though those competitors use aluminum frames for greater rigidity. For a budget-friendly defensive pistol, the ATI delivers more rounds per dollar.

FAQ

What is the overall length of the ATI Alpha Maxx HGA Pistol?

The overall length is 22 inches with the brace collapsed. This makes it compact enough for vehicle storage or a backpack.

Does the pistol come with a warranty?

Yes, ATI provides a limited lifetime warranty on the polymer receiver and a 1-year warranty on the barrel and internal components. Check the manufacturer’s website for full terms.

Can I use standard AR-15 magazines with this pistol?

Yes, the magazine well accepts standard AR-15/M16-pattern magazines. The included 60-round mag is a proprietary design, but any mil-spec 5.56 magazine will work.

Is the barrel compatible with a suppressor?

Yes, the barrel is threaded 1/2×28 TPI, which is the standard for 5.56 suppressors. You’ll need a muzzle device that matches the thread pitch.

Trust & Shipping

• ✅ Nationwide delivery (all 50 states)
• ✅ Ships 1-2 business days
• ✅ 30-day returns
• ✅ Secure checkout

Browse more AR Pistols or check our Firearms section for similar builds. You can also explore AR Parts & Accessories to customize your platform.

Last updated: April 2026