Billet AR-15 upper in the original Ascend Armory Phoenix contour; handguards must sit flush with the receiver face.

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The Ascend Phoenix Billet Upper is the original Ascend Armory design, now machined by Next Level Armament from billet aluminum and hard coat anodized. It matches the older Ascend Phoenix lowers and Next Level's current Phoenix rifles, and Next Level's Horus 9mm conversion kits are built on it.
The sculpted contour carries two fitment cautions. Next Level says the upper will not accept a handguard that overlaps the receiver, so the handguard must sit flush against the front face. On its forged 9mm kit page, Next Level also notes the Ascend contour occasionally conflicts with lowers that use large or extended aftermarket bolt catches.

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Add the Next Level Armament Ascend Phoenix Billet AR-15 Upper Receiver to your build and see how it enhances your platform.