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New Frontier Armory C-4 Stripped Billet Lower - Side Folding

AR-15 Stripped Lower Receiver


Manufacturer: New Frontier Armory

Model: C4-SF

Type: AR-15 Stripped Lower Receiver with side folding rear end– milled from 7075 T6 aircraft grade aluminum billets

Caliber: Multi (will accept any upper and/or caliber designed for the AR-15 platform)

Magazine: Accepts any standard MIL-SPEC AR-15 magazine


Other Specifications and Features of the C-4 Billet — Side Folding AR-15 Lower Receiver:

  • Machined from 7075-T6 aircraft grade billet aluminum
  • Matte black hard-coat anodized per Mil 8625 Type 3 Class 2
  • Precision broached magazine well with beveled feed lips
  • Machined and engraved to be compatible with 45 and 60 degree short throw fire control selectors such as the BAD_ASS ST 45 Lever
  • Caliber marking of “Multi” so it can be used with many different caliber uppers
  • Compatible with all standard AR-15 components and magazines 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)
  • Compatible with Norgon and other aftermarket ambidextrous mag releases
  • Threaded bolt catch pin (Threaded hole and hardware)
  • Integrated large opening “winter” trigger guard
  • Proprietary hinge and folding parts included and installed at the factory
  • Proprietary Recoil Buffer included
  • Manufactured to MILSPEC on state of the art CNC equipment for consistent quality parts and exacting tolerances
  • Save money by building your own AR-15 rifle from the ground up exactly the way you want it configured

***WARNING – This firearm is not meant to be fired with the stock in the folded position.  New Frontier Armory is not responsible for any damage caused by attempting to fire with the stock folded.***

More Information
Product Type AR-15 Stripped Lower Receiver
Manufacturer New Frontier Armory
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