Alex Pro Firearms 5.56 Pistol 2.0 10.5 Pinkasaurus Rex

The Alex Pro Firearms 5.56 Pistol 2.0 10.5 Pinkasaurus Rex is a semi-automatic AR pistol built for shooters who want a compact, maneuverable platform without compromise. Chambered in 5.56 NATO, this short-barreled rifle (SBR) alternative pairs a 10.5-inch 4150CM nitride-coated barrel with a carbine-length gas system and an SBA3 pistol brace, giving you the handling characteristics of a rifle in a form factor that works in tight spaces—whether you're running a home-defense drill, hitting steel at close range, or building a specialized AR setup. The billet receiver set and ambidextrous controls make it equally at home in either hand, and the distinctive Pinkasaurus Rex Cerakote finish means you won't lose track of your gun on a crowded range.

Reliability and shootability are built in. The diamond-honed nitride M16 bolt carrier group and nitride-coated barrel barrel are designed for durability and easy cleaning, while the APF adjustable gas block lets you tune the gun's cycling to your ammo and preference. The APF 4.5 lb. drop-in trigger breaks cleanly without requiring gunsmithing, and the APF 9 M-Lok handguard gives you real estate for lights, laser, or whatever else your mission demands. The Magpul MOE grip rounds out an ergonomic package that feels natural whether you're a lefty or a righty.

No front or rear sights come mounted, so you'll choose your own optics path—whether that's iron backup sights, a red dot, or an LPVO. That flexibility is part of the appeal: you get a purpose-built 5.56 platform and the freedom to outfit it for your specific use. At this price and configuration, it's a serious option for anyone exploring the AR pistol world.

Key Features

• 10.5-inch 4150CM nitride-coated barrel with 1:7 twist rate for reliable 5.56 NATO accuracy
• Carbine-length gas system and adjustable gas block for tunable performance and reliability
• Diamond-honed nitride M16 bolt carrier group for durability and easy maintenance
• APF 4.5 lb. drop-in trigger—clean break without gunsmithing
• SBA3 pistol brace for stable, compact handling
• Billet aluminum receiver set with ambidextrous controls—lefty and righty friendly
• APF 9 M-Lok handguard for light and accessory mounting
• Magpul MOE grip for ergonomic control
• Pinkasaurus Rex Cerakote finish—distinctive, visible on any range
• No iron sights included—optics platform ready

Specifications

Frequently Asked Questions

What is an AR pistol and how does the SBA3 brace work?

An AR pistol is a short-barreled AR-platform firearm without a traditional stock, fitted instead with a stabilizing brace like the SBA3. The brace is designed to strap to your arm for support and control when firing one-handed, making the compact platform more stable and shootable than a bare pistol grip alone. The Alex Pro Firearms 5.56 Pistol 2.0 with its 10.5-inch barrel and carbine-length gas system delivers rifle-like ballistics in a much more maneuverable package.

Can I mount a scope or red dot on this pistol?

Yes. This gun ships with no iron sights, so the flat-top rail is open and ready for your choice of optics—whether a red dot, holographic sight, magnified scope, or LPVO. The billet receiver and M-Lok handguard are also compatible with standard Picatinny and M-Lok accessories for lights and other add-ons.

What does the adjustable gas block do, and why would I use it?

The APF adjustable gas block lets you dial in the right amount of gas flowing into the bolt carrier group. This is useful for tuning the gun to run reliably with different ammunition types, reducing recoil, or managing wear on specific components. It's a practical feature that gives you control over how the gun cycles.

Is this gun ambidextrous?

Yes. The Alex Pro Firearms 5.56 Pistol 2.0 features ambidextrous controls, making it equally functional for left-handed and right-handed shooters. The controls operate smoothly from either side without modification.