Alex Pro Firearms 5.56 Pistol 2.0 10.5 Liberty Fx Mlok

The Alex Pro Firearms 5.56 Pistol 2.0 is a purpose-built 5.56 NATO AR pistol engineered for shooters who want a compact, maneuverable platform without compromise. Built on a billet receiver set with ambidextrous controls, this 10.5-inch rifle delivers the performance of a short-barrel AR in a form factor designed for home defense, range work, or any scenario where a full-size rifle isn't practical. The Liberty FX Cerakote finish stands out visually while protecting your investment in the field or at home.

At the heart of this build is Alex Pro's attention to the details that matter: a 4150CM nitride-coated barrel with 1:7 twist ensures reliability and longevity, paired with a .750 carbine-length gas system tuned for consistent cycling. The diamond-honed nitride M16 bolt carrier group runs clean and smooth, while the included APF adjustable gas block lets you dial in performance to your exact setup. That means fewer malfunctions and predictable handling whether you're running suppressed or unsuppressed.

The ergonomics are dialed in from the factory: the APF 9 M-Lok handguard gives you room to mount lights, lasers, or grips without bulk; the Magpul MOE grip feels natural and secure; and the SBA3 pistol brace delivers stability and control. For the trigger, Alex Pro spec'd a smooth 4.5 lb. drop-in trigger that breaks clean without any gunsmithing required. This is a no-nonsense AR pistol that ships ready to shoot.

If you're shopping for a 5.56 pistol that balances compact size with genuine capability, or if you already run an AR and want a shorter, lighter option for close-quarters or vehicle carry, this is worth a serious look. No front or rear sights included—that means you can build the optics setup you actually want from day one.

Key Features

• 10.5-inch 4150CM nitride-coated barrel with 1:7 twist for reliability and accuracy
• Billet receiver set with ambidextrous controls for left and right-handed shooters
• Diamond-honed nitride M16 bolt carrier group for smooth, durable cycling
• APF adjustable gas block for tuning to your configuration and ammunition
• APF 4.5 lb. drop-in trigger—smooth break right out of the box
• APF 9 M-Lok handguard for mounting lights and accessories
• SBA3 pistol brace for stability and control
• Magpul MOE grip for ergonomic, secure handling
• Liberty FX Cerakote finish—distinctive appearance and corrosion resistance
• .750 carbine-length gas system optimized for 10.5-inch barrel performance

Specifications

Frequently Asked Questions

What is a 5.56 AR pistol, and is it legal?

An AR pistol is a short-barrel rifle configured with a pistol brace instead of a stock. Legality varies by state and federal regulations; we always recommend checking local and state laws before purchase. The Alex Pro Firearms 5.56 Pistol 2.0 is configured as a pistol platform and ships with an SBA3 brace.

Can I mount an optic or laser on this pistol?

Yes. The flat-top billet receiver accepts any standard picatinny-mounted optic. The APF 9 M-Lok handguard also allows you to mount lights, lasers, or grips without removing the handguard. No front or rear sights are included, so you have full freedom to choose your sight system from the start.

What does the adjustable gas block do?

The APF adjustable gas block lets you tune gas flow to match your ammunition, suppressor use, or ammunition preference. This reduces recoil, improves reliability, and can help minimize wear on components depending on your setup.

Is the trigger user-installable, or does it require a gunsmith?

The APF 4.5 lb. trigger is a drop-in design, meaning it's designed to install without custom gunsmithing. That said, if you're not comfortable installing triggers, a gunsmith is always a good option.