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New Frontier Armory C-5 Stripped Billet Lower - Side Folding

AR-9 Lower Receiver

Out of stock

FFL Required Before Shipping.

Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.



  • Manufacturer: New Frontier Armory
  • Model: C5-SF
  • Type: Stripped Lower Receiver — milled from 7075 T6 aircraft grade aluminum billets
  • Caliber: 9MM
  • Magazine: Accepts any MP5 style 9mm magazines
  • Weight: 16.4 oz


Specifications and Features:

  • 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
  • Compatible with most standard AR-9 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 trigger finger rests with grooves (above and below mag release/mag catch)
  • Threaded bolt catch pin (Threaded hole and hardware)
  • Integrated large opening “winter” trigger guard
  • Proprietary magazine catch assembly, feed ramp, and ejector is included and installed at the factory
  • Proprietary hinge and folding parts included and installed at the factory
  • Proprietary Pistol Weight Recoil Buffer 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!


Please NOTE: You must use an upper that has widening cuts to accept the larger width MP5 Magazines

More Information
Product Type AR-9 Lower Receiver
Manufacturer New Frontier Armory