Moriarti MA-40 .40 S&W 4" Micro ARP Pistol – Tucked Flash Can, SBA5, Non-LRBHO

.40 S&W Micro Pistol: Specs & Features

The Moriarti MA-40 40SW 4″ Micro ARP Pistol brings Moriarti’s modern Micro ARP styling to the 40SW / .40 S&W platform. Built around an ultra-compact 4″ 4150 CMV barrel, this MA-40 pairs a compact free-float M-LOK handguard with a tucked flash can for the distinctive profile found across Moriarti’s newest Micro lineup.

The compact upper is paired with a Moriarti Glock-style billet PCC lower, .40 S&W hybrid bolt, 8 oz PCC buffer, Mil-Spec receiver extension, and SBA5 adjustable pistol brace. The direct-blowback system uses a streamlined Non-LRBHO configuration and accepts compatible Glock-style .40 caliber magazines.

Finished in anodized black, the MA-40 Micro is designed as the 40SW counterpart to Moriarti’s MA-9 Micro ARP, retaining a 4″ barrel specifically selected for the .40 S&W platform. The SBA5 brace and tucked front-end configuration give this model its own identity within the MA-40 family.

For shooters searching for a 40SW Micro ARP, .40 S&W AR pistol, compact AR-40, or Glock-style 40 caliber PCC, the MA-40 Micro delivers a modern Moriarti configuration built around one of the most established pistol calibers.

Key Features

• 40SW / .40 S&W chambering

• Ultra-compact 4″ Micro ARP configuration

• 4″ 4150 CMV heavy-profile barrel

• Black nitride barrel finish

• 5/8×24 muzzle thread

• Tucked flash can configuration

• Compact free-float M-LOK handguard

• Billet PCC upper receiver

• .40 S&W hybrid bolt

• Standard charging handle

• Direct-blowback operating system

• Non-LRBHO

• Moriarti Glock-style billet PCC lower

• Glock-style .40 caliber magazine compatibility

• 8 oz PCC buffer

• Mil-Spec receiver extension

• SBA5 adjustable pistol brace

• Anodized black finish

• Sights and optics not included

• Complete firearm – FFL transfer required

Specifications

Package Includes

• Moriarti MA-40 40SW 4″ Micro ARP complete pistol

• 4″ 4150 CMV black-nitride barrel

• Compact free-float M-LOK handguard

• Tucked flash can

• Billet PCC upper receiver

• .40 S&W hybrid bolt

• Standard charging handle

• Moriarti Glock-style billet PCC lower

• 8 oz PCC buffer

• Mil-Spec receiver extension

• SBA5 adjustable pistol brace

Magazine, sights and optics are not included.

Frequently Asked Questions

What makes this MA-40 different from the other MA-40 Micro configurations?
This model combines a 4″ 40SW barrel, tucked flash can, compact M-LOK handguard, anodized black finish, and SBA5 adjustable pistol brace, giving it a distinct configuration within the MA-40 Micro family.

Is this the 40SW counterpart to the MA-9 Micro ARP?
Yes. This MA-40 follows the compact tucked-front-end concept of Moriarti’s MA-9 Micro while using a 4″ barrel specifically for the 40SW / .40 S&W platform.

Does the MA-40 use Glock-style magazines?
Yes. The MA-40 is designed for compatible Glock-style .40 S&W magazines. A magazine is not included.

Does this MA-40 have last-round bolt hold open?
No. This model uses a Non-LRBHO configuration.

What buffer does the MA-40 use?
The MA-40 uses an 8 oz PCC buffer with a Mil-Spec receiver extension.

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

Does this MA-40 include an SBA5 pistol brace?
Yes. This configuration includes an SBA5 adjustable pistol brace.

Is an FFL transfer required?
Yes. This is a complete firearm and must be shipped to a licensed FFL dealer for transfer.

Product Image Notice

Images may not be the exact representation of the product.

FFL Transfer

This firearm must ship to a licensed Federal Firearms Licensee (FFL) for transfer. Please have your receiving dealer provide its FFL information and reference your Moriarti order or invoice number.

FAQ

Does it ship to an FFL?

Yes. This is a complete firearm, so it ships to your local FFL dealer for transfer. The buyer must meet all federal, state and local requirements.

What magazines does it use?

Glock-pattern .40 S&W magazines.

How does it operate?

It is a direct blowback system, so it has no gas tube. A heavy PCC buffer is used for reliable cycling.

Does it have last round bolt hold open?

No. It is a Non-LRBHO design, so the bolt does not lock back on an empty magazine.

What does "SBR ready" mean?

The rear setup accepts a stock, but adding a shoulder stock to a pistol with this barrel length changes its federal classification. Do it only in compliance with NFA and state rules.

Related: .40 S&W Micro ARP · all Micro ARP pistols and uppers