Some criticism here, your recoil is kind of too smooth. It’s more of like the gun aiming up, so I suggest you make the recoil a lot harder. By this I mean: bring the gun back, then after that you bring the gun slightly forwards to get the feeling of an actual recoil. (Sorry if I offended you and my criticism is bad)

PS: I forgot to mention this, but also aim the nozzle of the gun up a little bit so it can be more releastic at the end.