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Spear Arms

Spear Arms Premium AR-9 80% Receiver Set - Glock Pattern

Product Code : SARS80LA9


Available In-Store
Available Online
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WE DO NOT SHIP 80% products to Hawaii, Maryland, California, Colorado (Certain cites), Connecticut, Delaware, District of Columbia, Illinois, Rhode Island, New Jersey, New York, and Washington. ORDERS WILL BE CANCELED AND CHARGED A 20% CANCELLATION FEE.

Matched Upper & 80% Lower receiver set. Matching Black Anodized


  • 80% 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

  • Mil-Spec Black Anodized

The ZR9 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.  ZRTS has 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 80% configuration and are not considered firearms.  They can ship directly to the customer.

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 ZRTS lowers, the design is completely roll pin free for ease of assembly.

Lowers are mil-spec black anodized. 


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!!

These uppers fit great with our AR-9 lowers but are also compatible with any milspec AR-15 lower.

  • 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.