Complete G-5 Pistol Lower -- SBA3 Pistol Brace

New Frontier Armory

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2.90 LBS
G-5 Complete Pistol Lower
Pistol Cal
Black Ano
Magazine Type:
MP5 Style
7075 Billet Aluminum

G-5 Billet Complete Pistol Lower Receiver -- MP5 Style Mags



Specifications and Features of the G-5 Complete Pistol AR-9 Lower Receiver:

  • Machined from 7075-T6 aircraft grade billet aluminum
  • Matte black hard-coat anodized per Mil 8625 Type 3 Class 2
  • Precision machined magazine well with beveled feed lip for easy mag swaps
  • Machined and engraved to be compatible with 45 and 60 degree short throw fire control selectors such as the BAD_ASS ST 45 Lever
  • Includes factory installed MILSPEC Lower Parts Kit (LPK), MILSPEC Buffer Tube, Buffer Spacer and SBA3 Brace
  • Upgraded with a Hiperfire Rifle Built Curved Shoe Trigger and Guntology PDQ Ambi Bolt Release
  • Compatible with most standard AR-15 components and most aftermarket parts
  • Take down pin spring and detent hole is threaded for a 6-32 set screw for easy capturing (hardware included)
  • Upper tension screw behind grip screw (threaded hole with hardware included) to adjust any “slop” out of vertical fit between upper and lower
  • Ambidextrous contoured trigger finger rests
  • Threaded bolt catch pin (Threaded hole and hardware)
  • Integrated large opening "winter" trigger guard
  • Proprietary magazine catch assembly and ejector is included
  • Manufactured to MILSPEC (where applicable) on state of the art CNC equipment for consistent quality parts and exacting tolerances
  • Save money by building your own AR-9 rifle from the ground up exactly the way you want it configured and shoot for less!



**NOTE – 1. When installing the ejector and feed ramp, we recommend using Loctite or similar thread locker to prevent screws from backing out over time.



QUESTION: What bolt carrier group will work with an MP5 magazine fed AR-9?

ANSWER: You will need an AR-9 Bolt Carrier Group that has relief cuts to clear the MP5 style magazines. The AR-9 BCG that we sell will work with most AR-9s.

QUESTION: Do I need to use a special buffer when I build my AR-9?

ANSWER: Although its not technically required, it is advised that you either use a 9mm buffer (longer and heavier than carbine) or a spacer in your buffer tube before you place your spring in. The reason for this is to limit the BCG travel to the rear so it doesn't damage your lower by having the gas key hit the buffer tube extension. 

The New Frontier Armory G-5 Complete Billet AR-9 lower receiver is proudly MADE IN THE USA by hard working American men and women.


This is a serialized item considered to be a firearm by BATFE. This item must be shipped to a Federal Firearm License (FFL) holder. All BATFE, GCA & NFA rules apply!  You will be prompted during checkout to pick an FFL to ship to in your area using our FFL Locate tool.

YOU will be responsible for checking with your local FFL to ensure this weapon is legal in the state that you reside and that they will accept this weapon on your behalf and transfer it to you.

New Frontier Armory, LLC will NOT be responsible for any shipping or admin charges incurred by packages not being accepted by the FFL you choose during checkout.

Weight: 2.90 LBS
Dimensions: 17.50 x 7.50 x 3.00 in

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