UDR-15 Style 1 Universal Upper Receiver

The F-1 Firearms UDR-15 Universal Upper Receiver is the best of both worlds. The upper receiver is made with 7075-T6 aircraft quality domestic Aluminum ensuring quality and offers the signature F-1 Firearms skeletonizing for reduced weight and aesthetics...

UDR-15 Style 2 Universal Upper Receiver

The F-1 Firearms UDR-15 Style 2 Universal Upper Receiver has skeletonizing and a scalloped MIL-SPEC 1913 Picatinny rail. This receiver is made with 7075-T6 aircraft quality domestic aluminum, ensuring quality while the new F-1 Firearms...

UDR-15 Lefty Style 2 Skeletonized Upper Receiver

The F-1 Firearms Lefty UDR-15 3G Style 2 Universal Upper Receiver brings skeletonizing to the left-handed shooter market. The universal upper receiver is made with 7075-T6 aircraft quality domestic aluminum, ensuring quality, and offers the new F-1...