AngryGun have published some information and images of their wire cutter rail system on their Facebook page:
Angrygun Wire Cutter Rail System
WCRS SPECS
Material: Aluminium 6061
Type 1: Length: 16.2 inch (For 14.7 inch outer Barrel)
Type 2: Length: 13.5inch (For 12 inch outer Barrel)
Light Weight GBB Outer Barrels kit will available in the same time
(For WE, WA series and KWA)
PTW and AEG version will come out later
Estimate Release dates: Sept 2014
(FOR AIRSOFT ONLY)
(AngryGun)
