Jacob Grey Firearms Stripped Upper Receiver Billet AR-9 9mm Anodized Black

Jacob Grey Firearms Stripped Upper Receiver Billet AR-9 9mm Anodized Black. If it does not engage or engages before the last round is fired you can make VERY SMALL adjustments by SLIGHTLY bending the hook end down to lock faster or up to lock slower. They are set and function checked during assembly with brand new Glock magazines and our standard bolt catches. Because of varying magazine specs magazine specs changing over the life of the product different thicknesses of the pad on the bolt catch and other variables this adjustment may be necessary with your specific parts. NOTE: Some rail systems that use anti-rotation tabs may need slight modification to fit this upper. It is designed for flush mounting rails and standard hand guards. Specifications for Jacob Grey Firearms Billet AR-9 Stripped Upper Receiver: Manufacturer: Jacob Grey Firearms Color: Black Finish: Anodized Fabric/Material: 7075 T6 Aircraft Grade Billet Aluminum Cartridge: 9mm Luger Gun Make: AR Platform Gun Model: AR-9 AR-15 Condition: New Hand: Right Features of Jacob Grey Firearms Billet AR-9 Stripped Upper Receiver Compatible with all standard AR-15 / AR-9 components and most aftermarket parts Package Contents: Jacob Grey Firearms Billet AR-9 Stripped Upper Receiver Jacob Grey Firearms JG9URA: Stripped Upper Receiver Billet AR-9 9mm Anodized Black Jacob Grey Firearms JG9URA: Stripped Upper Receiver Billet AR-9 9mm Anodized Black