Evike.com Custom Swordfish P90 with Terminator Magazine Conversion Kit (Color: Black), Airsoft Guns, Airsoft Electric Rifles
Is the airsoft p90 box magazine/m4 mag adapter worth the buy?? - YouTube
Precision Combat Arms - This shows some of the things that you can do with your King Arms P90; Echo 1 M4 magazine adapter with H&K style suppressor covering a 420mm 6.01mm