Build your perfect AR-40 pistol with this 4" Slick Side Upper in .40 S&W, featuring a muzzle blast diverter to direct gas and reduce recoil. This upper assembly is built on a custom billet aluminum receiver and includes a MPI-tested Nitride Bolt Carrier Group (BCG) and AR-15 Mil-Spec charging handle for reliable performance. With a blowback gas system, no Last Round Bolt Hold Open (LRBHO), and an American-built M-LOK handguard, this upper is a compact powerhouse ready for action.
Barrel: 4" .40 S&W barrel, crafted from 4150 CMV steel with a nitride finish for exceptional durability and strength. The 1:16 twist rate ensures accurate shots, and the 5/8x24 threads are perfect for adding muzzle devices or flash hiders.
Muzzle Blast Diverter: This muzzle blast diverter minimizes the effect of muzzle blast, offering a more comfortable shooting experience and reducing impact on your surroundings.
Upper Receiver: Made from custom billet aluminum, the slick side upper is precision-machined to be strong and lightweight. The hard-coat anodized finish ensures that the upper is corrosion-resistant and built to last.
Bolt Carrier Group (BCG): The AR-40 MPI-tested Nitride Bolt Carrier Group is compatible with .40 S&W and 10mm rounds. The mag phosphate finish adds durability, making this BCG ready for action.
Handguard: The 4" American-built custom M-LOK handguard is sleek, lightweight, and perfect for attaching accessories with ease, providing both comfort and performance in a compact design.
Charging Handle: The AR-15 Mil-Spec charging handle is included, ensuring smooth and reliable operation.
No LRBHO: This upper assembly does not feature the Last Round Bolt Hold Open (LRBHO) function, offering a more cost-effective design.
Customization: Choose your color option to personalize your build and make it stand out.
Please Note: This upper assembly is sold with a BCG and charging handle but does not include a lower receiver, sights, or magazines.
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