Stern Defense Nickel Boron 9mm Complete Bolt Carrier Group - SD BU9 NiB ECHO

Stern Defense SD BU9 NiB ECHO Bolt Carrier AR-15 Glock-Pattern Upper Receiver 9mm Sliver 004-SD BU9-NiB-ECHO-D2-M. Here ya go Made with 8620 AISI steel and boasting a Nickel Boron Melonite hybrid finish the Stern bolt fits into Mil-Spec and Glock-pattern upper receivers. It functions with Colt SMG Glock magazines and it's fully compatible with standard AR15/M16 charging handles. Comes fully assembled with all sub-components installed including firing pin/spring/retaining pin extractor and extractor spring. Also included in bolt assembly is a propriety center and roll pins. Specifications for Stern Defense SD BU9 NiB ECHO 9mm Bolt Carrier for AR-15 Glock-Pattern Upper Receiver: Manufacturer: Stern Defense Color: Silver Finish: Melonite Fabric/Material: AISI 8620 Steel Cartridge: 9mm Luger Gun Make: AR Platform Gun Model: AR-15 Additional Features: Echo compatible Glock cut Custom 4140 billet extractor providing superior ejection. Condition: New Weight: 15.5 oz Bolt Material: 8620 Steel Carrier Material: 8620 Steel Package Contents: Stern Defense SD BU9 NiB ECHO 9mm Bolt Carrier for AR-15 Glock-Pattern Upper Receiver Stern Defense 004-SD BU9-NiB-ECHO-D2-M: SD BU9 NiB ECHO Bolt Carrier AR-15 Glock-Pattern Upper Receiver 9mm Sliver