Jacob Grey Firearms Complete Upper Assembly 9mm 4.5in 1-10 Twist 1/2x36 Thread Black

Jacob Grey Firearms Complete Upper Assembly 9mm 4.5in 1-10 Twist 1/2x36 Thread Black. DISCLAIMER: Firearm specifications are subject to change at any time based on availability and supply chain shortage. Specifications for Jacob Grey Firearms 9mm Complete Upper Assembly: Manufacturer: Jacob Grey Firearms Caliber: 9mm Luger Barrel Profile: Medium Taper Barrel Twist Rate: 1-10 Threads per Inch: 1/2x28 Handguard Type: Free-Float Muzzle Device: Brake Finish: Class III Type 2 Hard Coat Anodized Color: Black Fabric/Material: 7075-T6 Gas Block Journal Size-Diameter: .075 in Handguard Style: Round Rail Gun Rail: M-LOK Gun Type: Rifle Gun Make: AR Platform Gun Model: AR-9 Barrel Material: Chrome Moly Bolt Carrier Group Included: MIL-SPEC Magazine Included: No Charging Handle Included: MIL-SPEC Mount Type: M-LOK Projectile Caliber: .355 Caliber Features of Jacob Grey Firearms 9mm Complete Upper Assembly 9mm Specific Upper receiver with reduced ejection port for smaller rounds; Jacob Greys unique checkering design specific to the JG-9 platform; Designed to match lines with Jacob Grey JG-9 & JG-15 Billet Lower however will fit with any Mil-spec lower receiver; Contains integrated Last Round Bolt Hold Open (LRBHO) technology that reliably holds the bolt open when magazine is empty; LRBHO feature is designed for lowers that accept Glock style magazines Package Contents: Jacob Grey Firearms 9mm Complete Upper Assembly Jacob Grey Firearms 9MM45CUA: Complete Upper Assembly 9mm 4.5in 1-10 Twist 1/2x36 Thread Black