LaRue Tactical Stealth 1.0 AR-15 Stripped Upper Receiver M4 Black. Designed and machined to be compatible with standard AR-15/M4 Style threaded handguards. Provides optimal fit with LaRue LT-15 Lowers as well as other Mil-Spec Lowers. Complete with forward assist and dust cover. Specifications for LaRue Tactical Stealth 1.0 AR-15 Stripped Upper Receiver: Manufacturer: LaRue Tactical Color: Black Finish: Type III Hardcoat Anodized Fabric/Material: Aluminum Caliber: 5.56mm Gun Make: AR Platform Gun Model: M4 AR-15 Condition: New Last Chance: Yes Features of LaRue Tactical Stealth 1.0 AR-15 Stripped Upper Receiver M4 Feedramps Billet Aluminum Forward Assist and Dustcover Marked LaRue Near Rear of Rail Package Contents: LaRue Tactical Stealth 1.0 AR-15 Stripped Upper Receiver What firearm models does the manufacturer say LaRue Tactical Stealth 1.0 AR-15 Stripped Upper Receiver is compatible with? The manufacturer suggests that LaRue Tactical Stealth 1.0 AR-15 Stripped Upper Receiver is compatible with AR-15 M4LaRue Tactical LT-007-M4: Stealth 1.0 AR-15 Stripped Upper Receiver M4 Black