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Spear Arms

Spear Arms Premium AR-9 100% Receiver Set - Glock Pattern

Product Code : SA9BARS


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  • 100% complete billet 9mm lower

  • Works with all Glock pattern magazines

  • Roll pin free design

  • Oversized mag release

  • Massive magwell ramps

  • Works with +10 and +20 extensions

  • Multiple finishes available 

The SA9 Billet Lower is machined from aluminum. Along with its over-sized mag release, the lower features massive magwell ramps to aid in reloading; a feature not found on any other PCC lower.  We have tested with Glock, Pmag, and ETS magazines for complete reliability.  All of our 9mm lowers ship complete with mag release and ejector.

These lowers are in 100% configuration and ARE considered firearms.  They can NOT ship directly to the customer and must be shipped to an FFL.

They DO NOT have LRBHO as all AR9-Glock platforms have proven unreliable and inconsistent due to the heavy mass and spring rate.  The Glock follower and spring was not designed to hold back such a large reciprocating mass.  For competition and tactical use, it is better to be consistent so we have chosen to have a lower that never locks back on empty (similar to an MP5).

Our lowers also works with +10 and +20 extensions.   As with all Spear lowers, the design is completely roll pin free for ease of assembly. 


Our upper receiver is precision CNC-machined in house from solid billet aluminum. This is a top-tier upper receiver perfect for any high quality AR-9 build. We use these on our personal and full guns.
Slotted receiver and slick sided makes for a sleek and light upper to keep your PCC light!!
  • Oversized wall thickness to add strength for blowback operation
  • Designed specifically for pistol caliber AR builds
  • Widened ejection port for pistol caliber cases
  • Mil-Std 1913 Picatinny rail
  • Made in the U.S.A.

Determined at checkout.