Spring ?
AEG and gas are semi auto so DMR's not sniper rifles.
[Internally screams in HPA VSR build]
I will also echo what has already been said, as someone who plays the sniper role all the time; sniping isn't what everyone thinks it is. In truth, it's a lot of doing nothing. It's a lot of lying in stinging nettles. It's a lot of trigger discipline, not taking shots at people either because they're within your MED or you don't have a clear shot and can't risk letting them know you're there. It's a lot of pistol kills. It's a lot of radio chatter. It's a lot of watching a stray leaf or mild breeze knock your shot off course. You can't take gunfights because you will lose to the 13 year old rental with an m4 and a high cap magazine. Every shot you will take has to be at people who don't know where you are, as if they know where you are they can literally dodge your shots at range and suppress you with full auto fire. At the end of the day, we're firing air powered muskets with projectiles that weight less than a gram.
Also, depending on your site, a 2.3J bolt action rifle can be more of a hindrance than a help. I've totally moved away from using my 2.3J VSR at my local site at the moment because during the summer it gets super overgrown, so that 30m MED just hinders me with no benefit as there simply aren't long enough sight lines.
Sniping is more of a role than a rifle, much like designated marksman is a role, not a rifle, we just use those terms as an easy way to differentiate power limits. I would call my HPA m21 a "sniper rifle" but it's kept at 1.1J like any AEG so I have no MED with it. You can fulfill the "sniper" role with an AEG for the most part, and if you're playing it properly having someone out of range isn't an issue because you just wait for them to take a few steps forward as they should have no idea you're watching them. I will always advise people play the sniper role with their AEG first (hypocritcally because my first RIF was a bolt action rifle) and see if they enjoy it before investing, as it's typically quite expensive. It's a very rewarding way to play, but it's a very different way to play. It's very much not for everyone.