MA-45 .45 ACP 4″ Micro ARP Pistol – Shroud | SBA5

AR-45 ACP

Moriarti MA-45 .45 ACP 4″ Micro ARP Pistol – Shroud | SBA5 | Non-LRBHO

The Moriarti MA-45 .45 ACP 4″ Micro ARP Pistol brings the big-bore MA-45 platform into an ultra-compact configuration built around a 4″ 4150 CMV barrel, barrel shroud, SBA5 adjustable pistol brace, and Non-LRBHO operating system.

The 4″ barrel features a black nitride finish, 1:16 twist, and 5/8×24 muzzle threads. A compact shroud complements the short barrel and handguard configuration, giving the MA-45 Micro its distinctive compact profile.

A free-float M-LOK handguard provides mounting space while keeping the front end compact. The slick-side billet PCC upper maintains a clean profile and houses a dedicated .45 ACP PCC bolt for the direct-blowback operating system.

The Moriarti Glock-style billet PCC lower is designed around compatible Glock-pattern .45 ACP magazines and is paired with a heavy PCC buffer system. This configuration is Non-LRBHO, distinguishing it from Moriarti's premium LRBHO MA-45 configurations.

An SBA5 adjustable pistol brace completes the updated Micro configuration, while available Moriarti color options allow customers to select their preferred finish.

FFL REQUIRED – This is a complete firearm and must be shipped to a Federal Firearms Licensee (FFL) for transfer.

Key Features

• Moriarti MA-45 Micro ARP configuration

• .45 ACP chambering

• 4″ 4150 CMV barrel

• Black nitride barrel finish

• 1:16 twist

• 5/8×24 muzzle threads

• Compact barrel shroud

• Free-float M-LOK handguard

• Slick-side billet PCC upper

• Direct-blowback operating system

• Dedicated .45 ACP PCC bolt

• Non-LRBHO configuration

• Moriarti Glock-style billet PCC lower

• Compatible with Glock-pattern .45 ACP magazines

• Heavy PCC buffer system

• Mil-Spec receiver extension

• SBA5 adjustable pistol brace

• Choose from available Moriarti colors

• Complete firearm

• FFL transfer required

Specifications

Package Includes

• Moriarti MA-45 .45 ACP 4″ Micro complete pistol

• 4″ 4150 CMV barrel

• Barrel shroud

• Free-float M-LOK handguard

• Slick-side billet PCC upper

• Dedicated .45 ACP PCC bolt

• Moriarti Glock-style billet PCC lower

• Heavy PCC buffer system

• Mil-Spec receiver extension

• SBA5 adjustable pistol brace

• Selected color configuration

Magazine, sights, and optics are not included.

Frequently Asked Questions

What barrel length does this MA-45 Micro use?
This configuration uses a compact 4″ 4150 CMV barrel.

What is the muzzle thread?
The 4″ barrel is threaded 5/8×24.

What muzzle device is included?
This MA-45 Micro includes a barrel shroud as part of its compact configuration.

Does this MA-45 include an SBA5 brace?
Yes. This configuration includes an SBA5 adjustable pistol brace.

Does this pistol feature LRBHO?
No. This MA-45 Micro uses Non-LRBHO operation.

What magazines does it accept?
The MA-45 is designed around compatible Glock-pattern .45 ACP magazines.

Can I choose the color?
Yes. Select from the available Moriarti color options offered for this configuration.

Is an FFL transfer required?
Yes. This is a complete firearm and must ship to a licensed Federal Firearms Licensee for transfer.

Product Image Notice

Images may not be the exact representation of the product.

Color and component appearance may vary slightly from the firearm pictured.

FFL Transfer

This firearm must ship to a licensed Federal Firearms Licensee (FFL) for transfer.