Bought the Railjack without testing it on live believing it would be like the one on PTS. Luckily I used certs. In its current state I can't recommend it. Maybe it will grown on me but I doubt it at the moment. There is barely any difference between Longshot and Railjack. The Railjack has slightly less drop and maybe it's a bit earlier at the target, but I had to conclude it from the video. Gameplay wise I can't really feel the difference, but the delay vs live targets is very noticeable. With the delay I can't recommend it, without it maybe, if you don't own the Longshot already, as the gun would be only a slight upgrade. Here's a video comparison between the two guns from PTS and live showing non-silenced/silenced shots. The delay is not very visible, you have to fire the gun in live environment to really notice it.