F-1 Firearms UDR-15-3G Stripped Billet Upper Receiver - Black

SKU: F-1-UDR-15-3G-BLK
MPN: F-1-UDR-15-3G-BLK
Manufactured by F-1 Firearms
2 Reviews


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BrandF-1 Firearms
Feed RampsM4
FinishHardcoat Anodized
Forward AssistIncompatible
Port DoorNot Compatible
Receiver Material7075-T6 Aluminum
T MarksUnmarked

Ratings & Reviews

2 reviews

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Perfect fit

by -

I matched this with my Spike's Tactical lower and it's a perfect fit. A few others have a tiny bit of wobble but not the F1. Very happy. And primary arms has the best price!

Super light and incredible looking!!!!


This is the lightest upper I have ever seen. The tolerances of the fit (pins, bcg) are really tight fitting and the coating is decent. Given the cutouts, it is quite sturdy and matches well to forged lowers too. Tried a Gen 2 Aero Precision lower and has zero wobble (like matched billet). Get a Fortis 12" lower to go with and your AR will be both 3gun and Gun Show ready!