Mean Arms Bearing Delay AR-15 9mm 16in/14.5in Upper Receiver 1/2x28 Black

Mean Arms Bearing Delay AR-15 9mm 16in/14.5in Upper Receiver 1/2x28 Black. The ball bearings interface with corresponding features in the barrel extension and provide the lockup in battery and the delay after firing. The system can be tuned by replacing the Lifter to change the angle of the surfaces that push the bearings from the inside of the BCG. The bolt face includes our unique center ejector to provide the most consistent ejection of any 9mm AR on the market. The firing pin passes through the ejector. Specifications for Mean Arms Bearing Delay AR-15 9mm 16in/14.5in Upper Receiver: Manufacturer: Mean Arms Caliber: 9mm Luger Barrel Length: 16 in 14.5 in Barrel Twist Rate: 1-10 Firearms Threads Per Inch: 1/2x28 Handguard Type: Free-Float Muzzle Device: Multiport Muzzle Brake Finish: Anodized Color: Black Fabric/Material: Steel/Aluminum Handguard Length: 13.625 in Handguard Style: Hybrid Rail Gun Rail: M-LOK Picatinny Gun Make: AR Platform Gun Model: AR-15 Weight: 3.7 lb Gas System Type: Proprietary The Bearing Delay Upper Receiver is a complete upper receiver system ready to be paired with the AR lower reciver of your choice Available in 5 different barrel lengths: 4.5'' 7.5'' 11''14.5'' 14.5'' pinned and welded and 16'' - all threaded for a 1/2-28 muzzle device No 9mm-specific buffer needed The Bearing Delay Upper Receiver is designed to work with standard AR-15 buffers. Package Contents: Mean Arms Bearing Delay AR-15 9mm 16in/14.5in Upper Receiver What firearm models does the manufacturer say Mean Arms Bearing Delay AR-15 9mm 16in/14.5in Upper Receiver is compatible with? The manufacturer says that Mean Arms Bearing Delay AR-15 9mm 16in/14.5in Upper Receiver is compatible with AR-15Mean Arms 2102169: Bearing Delay AR-15 9mm 16in/14.5in Upper Receiver 1/2x28 Black