17.5KG OOD Longshot Spring
I used this spring cut down in my Aeon pro with about 9 inches of brass barrel and got 265 FPS. It’s a heavy prime, but for those numbers and gained distance it’s worth it and at the low price for the spring it was definitely worth giving it a try. Highly recommend this item and shop. Out of darts is great for low prices and fast shipping. Along with excellent customer support.