This is a mod I did a while ago (and posted on Reddit), but I don't have any tools or blasters to mod anything right now, and I want to kick off the subverse. It's a 3s MOSFET mod with a pair of Krakens and Cyclones in a 42 mm OFP 3d-printed cage (from Silver Fox Industries if i remember right). I think I chrono'd it at between 130 and 150 FPS, don't have it to test now (buried in a storage unit).
No, the r/Nerf subreddit isn't particularly toxic YET, but I feel alternatives are good, Reddit is going downhill, and it's only a matter of time until the foam-flinging community goes down with it.
