F5 Mfg 80% Billet Lower/F5 Mfg Billet Upper Receiver With 80% Completion Jig Combo

in stock


F5 Mfg 6061 Billet Upper/Lower Receiver Set

  • Color: Raw – no anodization
  • 100% Mil-Spec
  • Fire/Safe/Auto
  • Built-in trigger guard
  • Rear takedown lug is pre-milled
  • Billet 6061-T6 Aluminum
  • 100% Made in the USA

80% Machining Completion Jig



in stock

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The ultimate 80% receiver combo!

F5 Manufacturing is excited to offer you our Billet Upper Receiver and Billet 80 Lower Receiver as a discounted combo set and the completion jig to finish out your 80% lower!

The lower receivers for your AR-15 weapons platform are 80% complete and do not require an FFL to purchase. All that’s needed to have a fully functioning AR-15 lower is:
● Drill the hammer pinhole
● Drill the trigger pinhole
● Drill the safety selector lever hole
● Machine the fire control group cavity

These are in the white blasted and ready to finish as you choose. Perfect for that custom build. Start your next AR-15 off right today with these high quality 6061 billet 80% lowers manufactured in house by F5 MFG.

Our uppers are precision CNC machined out of 6061 billet aluminum. They have been designed and manufactured to give your AR the performance and look you expect. Get them now and keep them in your safe just in case. They feature a fully integrated Picatinny rail, Slim profile, and dust cover ready. For that special custom AR, we have them available in raw aluminum as well, straight off of the machine. These high-quality billet uppers can’t be beaten for the price.

AR-15 80% machining jig to ensure completing your 80 lower is easy and worry-free. These machining jigs are designed to take all the guesswork out of finishing your 80% lower. Not a machinist, no worries, all the tools are included so you can do the work in the comfort and privacy of your home workshop.

These jigs are machined out of billet 6061 aluminum and precision laser cut out of steel to give you the best tool for the job. Make sure before you start on your next AR build you have one of these in your toolbox. Buying this jig is an investment in your ability to uphold your 2nd amendment rights. Any mil-spec 80 lower will work with this jig, but why not pick a few from F5 MFG to ensure you have all you need to get your next AR build.

A link to the instructional video will be included in your kit to help you step by step from start to finish.


No FFL is required to purchase this lower receiver. This Billet 6061-T6 Aluminum 80% lower receiver is not considered a firearm and is compliant with the gun control act of 1968 and not classified as a firearm as defined in 18 U.S.C. 921(a)(3).


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