Star Rival Atlas 18KG Spring

The Star Rival Atlas 18KG Spring is a drop-in upgrade spring built specifically for the Nerf Rival Atlas, rated at 18KG, the higher end of the spring ratings Monkee Mods stocks for this platform. If you've already tried a lighter upgrade spring and want to push your Atlas further, this is the next step up, swapping in for the stock spring without needing any cutting, filing, or non-standard tools.

As a springer platform, the Atlas relies entirely on spring tension for its shot power, so stepping up to an 18KG spring is one of the most direct ways to noticeably increase performance over the factory setup. It's a straightforward internals job for anyone who's opened up an Atlas before, and a natural next purchase alongside other Springer Internals parts if you're building out a fully upgraded Rival springer. Currently on SALE, so it's a good time to grab one for your Atlas build.