MadBull Airsoft announce that their PRI Gern III Delta and Round Rails are now available in Asia, so check your retailers in the region for stock availability. Below, MadBull explain the differences between the Delta and Round versions, the versions in materials, and a video is also provided showing how they can be installed.
"PRI GIII Delta Rail
If you are into small arms history, you must have heard of SPR (Special Purpose Rifle.)