AR-40 40 S&W 4" Micro Pistol Build Kit – MLOK, Classic AR-15 Parts | Moriarti Armaments

Build Kits

AR-40 40 S&W 4" Micro Pistol Build Kit – MLOK, Classic AR-15 Parts | Moriarti Armaments

The AR-40 40 S&W 4" Micro Pistol Build Kit from Moriarti Armaments is the ideal choice for those looking to build a powerful and compact AR-40 pistol chambered in 40 S&W. This complete build kit includes all the necessary components, excluding the 80% stripped lower receiver, which must be finished before assembly. Made with mil-spec components and crafted in the USA, this kit is designed for maximum durability, reliability, and precision.

Key Features:

• Barrel: 4" 4150 CMV M4 Profile barrel, chambered in 40 S&W, with a 1 in 16” twist rate for reliable accuracy in a compact design.
• Thread: 5/8X24 thread for compatibility with a wide range of muzzle devices.
• Gas Block: Blowback gas system for smooth cycling and reduced recoil, ensuring reliability with 40 S&W ammo.
• Upper Receiver: M4 flat top forged 7075 T6 aluminum upper receiver with a hard coat anodized finish, complete with forward assist and ejection port cover.
• Handguard: 4” M-LOK free float handguard, providing superior ergonomics and versatility for attaching M-LOK accessories.
• Bolt Carrier Group (BCG): 40 S&W BCG with M16 cut, chrome-lined, phosphate finish, and MPI tested for robust, long-lasting performance.
• Charging Handle: Standard AR-15 charging handle for easy and smooth operation.
• Lower Parts Kit: Classic AR-15 Mil-Spec Lower Parts Kit, which includes everything needed to complete your stripped lower receiver (lower receiver not included).
• Buffer Tube Assembly: Includes AR-15 Pistol Buffer Tube Assembly with a 7.2 buffer, AR-15 spring, and foam for optimal operation and recoil management.

This kit is the perfect solution for building your AR-40 pistol with all the parts you need for a high-performance, pistol-caliber carbine. With a compact 4" barrel and MLOK handguard, you’ll get a well-balanced firearm that’s ideal for personal defense, target shooting, and recreational use.

Note: The 80% stripped lower receiver is not included. Some machining is required to complete the lower receiver. This kit is not an FFL item as it requires the completion of the lower receiver. Images may not be an exact representation of the product.