RPF member tmax (Tarry Mortlock) built this airsoft version of the Oblivion rifle using a PTS Masada.
You can find his excellent detailed build thread here. Scroll down to view more images of these cool weapons. (Click on the photos to enlarge them)
This photo from PeterLC helped him to assign the right placement for all the parts.
Test fit photo.
Photos of the completed rifle (with the exception of the mag).
Completed Pistol with all the decals.
Check out Tarry's other awesome collection of sci-fi weapons including Rita Vrataski's sword from Edge of Tomorrow.