F-1 Firearms UDR-15 3G Skeletonized Universal Upper Receiver

F-1 Firearms UDR-15 3G Skeletonized Universal Upper Receiver

Product Code:
Calculated at Checkout
$300.00 $270.00

MPN: UDR-15-3G-1U-BLK / UDR-15-3G-2U-BLK


  • Newly designed skeletonizing and scalloped Mil-Spec Picatinny Rail
  • Super light-weight design
  • Scalloped top Mil-Spec picatinny rail
  • Made in the U.S.A


  • Material: 7075 Billet Aluminum
  • Finish: Type III Class 2 Hard Coat Anodized
  • Weight:
    • Style 1: 6.63 oz.
    • Style 2: 7.09 oz.


  • AR-15


For years shooters have pushed the limits to create unique firearms. Without the Wildcat world, we wouldn't have some incredible cartridges at our disposal. That being said, when you reach for the sky, make sure you stand on something solid. One area people have ventured into is skeletonized weapons frames. Now, a skeletonized upper receiver is a thing of beauty. However, it can be dangerous you do it haphazardly. When you make this leap, you must take it with a quality-driven, respectable firm like F-1 Firearms.

Look Wild, But Play It Safe

At first glance, an F1 skeletonized upper receiver looks wild. You wonder how is this thing going to fire and stay together? Well, this radical look is just a typical day for the folks at F-1 Firearms. The maximum material is safely removed from the F1 lightweight upper receiver to allow it to run reliably. Don't you dare try this at home. It's not amateur night. Countless hours go into the design of your F1 skeletonized upper receiver. F-1 Firearms employ critical quality control and testing to ensure the UDR-15 is safe and reliable.

It Hits And Fits The Mark

The F1 lightweight upper receiver starts its life as a top-grade billet of 7075-T6 aluminum. F-1 Firearms passes on the traditional forward-assist but includes a full-length Picatinny rail. Even with this trade-off, the F1 skeletonized upper receiver is crazy light. F-1 makes sure that this elite upper receiver is compatible with any ML-SPEC lower that you have. Therefore, testing the F-1 UDR-15 quality is as easy as swapping your parts over. It's not amateur night for sure, but it's not rocket science either. F-1 Firearms has already taken care of that for you.

Write a Review

2 Reviews

  • Skeletonized upper

    Posted by Sam on 31st Jan 2020

    Well built with excellent quality! Wing Tactical's shipping is next level too!!

  • Upper Receiver

    Posted by Dustyn on 24th Dec 2019

    Great! Everything fitted as it should and especially made everything come together. Definitely would buy again.

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