Next Level Armament Ascend Phoenix Billet AR15 Upper Receiver Black. This upper will will fit on older model Ascend Phoenix lowers. Build a complete upper to match your original Ascend rifle or to match your new Next Level Ascend Phoenix rifle. Either way you wont find better quality or get more looks at the range with your Ascend receivers. Specifications for Next Level Armament Ascend Phoenix Billet AR15 Upper Receiver: Manufacturer: Next Level Armament Color: Black Finish: Anodized Fabric/Material: Aluminum Gun Make: AR Platform Gun Model: AR-15 Condition: New Package Contents: Next Level Armament Ascend Phoenix Billet AR15 Upper Receiver What firearm models does the manufacturer say Next Level Armament Ascend Phoenix Billet AR15 Upper Receiver is compatible with? The manufacturer suggests that Next Level Armament Ascend Phoenix Billet AR15 Upper Receiver is compatible with AR-15Next Level Armament ASC100: Ascend Phoenix Billet AR15 Upper Receiver Black