The Liberator looks and feels great as a blaster - but let's be honest, 90 fps stock isn't really up to Rival par. This custom spring costs peanuts and is SUPER easy to install, turning it into an absolute monster.
Really pleased with Out of Darts as well, (international) shipping was speedy and without any issues.
The only reason I'm not leaving a 5 star review is because I have some concerns with the longevity of my blaster, which is very creaky and full of wobble, and I kinda doubt it'll be able to handle the K25 over time. Still, that has nothing to do with Out of Darts and their impeccable service.
Delivery was quick and the spring was nicely packaged. Super excited to get this installed. So much better than the below rival average. This thing hits like a beast without the prime being too tough.