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M1 Machining AR-9 80% Billet Lower Receiver - Raw

80% Lower

Out of stock

State Restrictions:
New Jersey - Will not ship due to state restrictions!
Washington State - No in-store purchase. Shipping available only!


The M1 Machining 80% AR9 Lower Receiver is the base of any AR9. The reason why an FFL is unnecessary is that by design, the 80% lower receiver demands that the builder mills out the firearm control group area. This converts the 80% lower into a full complete AR9 lower receiver. This is done using a milling jig, such as the Milling Jig from M1 Machining and other basic tools such as the drill press, drill, standard hand-drill or a router along with a set of drill bits.


  • MIL-SPEC Type III hard coat anodized in Black or Raw;
  • Accepts Glock Magazines 
  • 7075-T6 Heat Treated Aerospace 7075 Billet Aluminum;
  • Completed weight: 10 ounces;
  • Integral winter trigger-guard for added strength;
  • Flared magwell to improve mag changes;
  • As determined by the firearms technology branch of the ATF, this lower receiver is not classified as a “firearm” as defined by the GCA of 1968.
  • The M1-AR9 may not be compatible with all other Manufacturers Jigs.
  • Mag release & Ejector are included
More Information
Product Type 80% Lower
Manufacturer M1 Machining
Color Raw