The new King Arms P90 Rear Sling Mount gets demo'd in the video below to prove that it's sturdy enough and hangs on to your P90 tenaciously. This is made for the King Arms P90 AEG series and it comes with a sling swivel that can be attached in 3 different positions. Check with your retailer of its availability and also if it can be used in P90s from other airsoft brands.