Moriarti 9mm / 22LR / .40 Slick Side Upper Receiver No Forward Assist Black Anodized. 40 Slick Side Upper Receiver is a high-quality forged 7075-T6 aluminum upper designed for pistol caliber builds. This upper receiver offers a slick side configuration meaning it does not have a forward assist making it an ideal choice for pistol caliber AR-15 builds. Specifications for Moriarti 9mm / 22LR / .40 Slick Side Upper Receiver: Manufacturer: Moriarti Color: Black Finish: Anodized Fabric/Material: Aluminum Caliber: .22 Creedmoor LRP 9mm Luger .40 S&W Gun Make: AR Platform Gun Model: AR-15 Features of Moriarti 9mm / 22LR / .40 Slick Side Upper Receiver Pistol Caliber Compatibility: This upper is specifically designed for use with .22LR 9mm and .40 caliber rounds offering versatile options for building your pistol caliber AR. Forged 7075-T6 Aluminum: Precision machined from Mil-Spec 7075-T6 aluminum this upper is built for durability strength and lightweight performance making it perfect for tough shooting conditions. Type III Hardcoat Anodized Finish: The upper receiver features a Type III hardcoat anodized finish enhancing wear resistance corrosion protection and overall longevity. Slick Side Configuration: This upper does not include a forward assist providing a clean and simplified design ideal for pistol caliber AR builds. Sized Ejection Port Door: The ejection port door is specifically sized to handle 9mm .40 and .22LR rounds ensuring smooth ejection during firing. Military Specification: Machined to Mil-Spec standards this upper is built for reliability and precision. Package Contents: Moriarti 9mm / 22LR / .40 Slick Side Upper Receiver What firearm models does the manufacturer say Moriarti 9mm / 22LR / .40 Slick Side Upper Receiver is compatible with? The manufacturer says that Moriarti 9mm / 22LR / .40 Slick Side Upper Receiver is compatible with AR-15Moriarti UPR-9-22-SLICK: 9mm / 22LR / .40 Slick Side Upper Receiver No Forward Assist Black Anodized