9MM Rifle upper assemblies — a barreled, assembled upper ready to drop onto your AR-15 lower. Includes the upper receiver, barrel, gas system, handguard, and muzzle device; most ship without a BCG or charging handle (some include them — check the title). No sights or optics.

AR9 9mm AR-15 Rifle Uppers

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Choosing a 9mm AR Rifle Upper

With or without a BCG and charging handle

Check the listing for whether the blowback 9mm BCG and charging handle are included or supplied separately.

What's in the assembly

Upper receiver, barrel, handguard, and muzzle device — assembled. No gas block or gas tube (9mm is blowback). No sights or optics. Confirm BCG/charging-handle details on the listing.

Blowback and magazine pattern

A 9mm AR is blowback-operated, not gas-operated. Magazines are pattern-specific (commonly Glock or Colt), set by your lower's magwell.

Frequently Asked Questions

Is a 9mm AR gas-operated?

No — blowback. The BCG and buffer run the action; there's no gas system.

What magazines does a 9mm AR use?

Pattern-specific mags, usually Glock-pattern or Colt-pattern, set by your lower's magwell.

Do you need an FFL to buy an upper?

No. The upper isn't the serialized part, so it ships without an FFL.