Stern Defense SD BU9 NiB ECHO Bolt Carrier AR-15 Glock-Pattern Upper Receiver 9mm Sliver 004-SD BU9-NiB-ECHO-D2-M

Stern Defense Ar-15 Sd Mod 5 9mm Upper Receivers M-Lok Complete - Sd Mod 5 9mm Upper Receiver 8.5in

The Stern Defense SD Mod 5 9mm Upper Receivers are unique with handguards that extend beyond the end of the barrels. The 8.5" barreled upper has a 10" M-LOK free float handguard, and the 6" barreled upper has an 8" M-LOK free float handguard. To... ... more

Stern Defense AR-15 Upper Receiver .45 ACP 16.1in Barrel 15in MLOK Rail SD BU45 Bolt SD CH1 Charging Handle SD CB45 Comp Break Black

Stern Defense AR-15 Upper Receiver .45 ACP 16.1in Barrel 15in MLOK Rail SD BU45 Bolt SD CH1 Charging Handle SD CB45 Comp Break Black. WHILE OUR 45 BOLT WILL ACCOMMODATE A JP SILENT CAPTURE SPRING. WE DO NOT RECOMMEND IT AS 45ACP CAN DAMAGE THE JP... ... more

Stern Defense SD BU45 Bolt Carrier AR-15 Glock-Pattern Upper Receiver .45 ACP Black 004-SD BU45-D1-M

Stern Defense SD BU45 Bolt Carrier AR-15 Glock-Pattern Upper Receiver .45 ACP Black 004-SD BU45-D1-M. 45ACP UPPERS MUST HAVE AN ENLARGED EJECTION PORT. WHILE OUR 45 BOLT WILL ACCOMMODATE A JP SILENT CAPTURE SPRING. WE DO NOT RECOMMEND IT AS 45ACP... ... more

Stern Defense AR-15 Upper Receiver 9mm 16.1in Barrel 15in MLOK Rail SD BU9 Bolt SD CH1 Charging Handle SCB 9 Comp Break Black 015-SD15INCHMOD4-KK

Stern Defense AR-15 Upper Receiver 9mm 16.1in Barrel 15in MLOK Rail SD BU9 Bolt SD CH1 Charging Handle SCB 9 Comp Break Black 015-SD15INCHMOD4-KK. ) Stern Defense 16.1 inch 9mm barrel. SD CB9 COMPENSATOR BREAK Stern Defense assembled upper receiver... ... more

Stern Defense AR-15 10in Upper Receiver 8.5in 9mm Barrel MLOK Rail SD BU9 Bolt SD CH1 Charging Handle SD HBC Blast Can Black 015-SD10INCHMOD5-KK

Stern Defense AR-15 10in Upper Receiver 8.5in 9mm Barrel MLOK Rail SD BU9 Bolt SD CH1 Charging Handle SD HBC Blast Can Black 015-SD10INCHMOD5-KK. ) Stern Defense 8.5 inch 9mm barrel. SD HBC 9MM Blast Can. Stern Defense assembled upper receiver with... ... more

Stern Defense AR-15 Upper Receiver 9mm 6in Barrel 8in MLOK Rail SD BU9 Bolt SD CH1 Charging Handle SD HBC Blast Can Black 015-SD8INCHMOD5-KK

Stern Defense AR-15 Upper Receiver 9mm 6in Barrel 8in MLOK Rail SD BU9 Bolt SD CH1 Charging Handle SD HBC Blast Can Black 015-SD8INCHMOD5-KK. If you're starting a build shopping for AR15 Upper Receivers is one of the first steps. To make it easier... ... more

Stern Defense Ar-15 Sd Mod 4 9mm Upper Receiver 4in M-Lok Complete - Sd Mod 4 9mm Upper Receiver 4in

The Stern Defense SD Mod 4 9mm Upper Receiver is a complete, ready to go, upper receiver solution for those looking to spend less time building and more time shooting. The 4 inch, 1-10 twist, Melonited barrel, is free float in a 4in M-LOK handguard... ... more

Stern Defense Ar-15 Gen 2 Bolt Carrier For Glock & Colt .40s&W

Made with 8620 AISI steel and boasting a Manganese Phosphate 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.... ... more

Stern Defense SD 4in Mod4 M-Lok 4in Barrel 9mm Black Complete Upper Receiver Black SDINBRLKK

Stern Defense SD 4in Mod4 M-Lok 4in Barrel 9mm Black Complete Upper Receiver Black SDINBRLKK. ) Stern Defense 4 inch 9mm barrel. SD MBC 9MM Blast Can. Stern Defense assembled upper receiver with dust cover and forward assist. Stern Defense SD BU9... ... more

Stern Defense SD BU9 Bolt Carrier AR-15 Glock-Pattern Upper Receiver 9mm Black 004-SD BU9-D1-M

Stern Defense SD BU9 Bolt Carrier AR-15 Glock-Pattern Upper Receiver 9mm Black 004-SD BU9-D1-M. These Bolt Carrier Groups from the experts at Stern Defense are built with Melonite coatings on 8620 AISI steel with a melonite finish to reduce friction... ... more