Its kind of like the armaspec recoil sysytem, it has a rod that protrudes forward into the bolt. Without augmentation of the bolt or the recoil device, i dont see it working in an FX9. Now, the Sheel roller day is proven to work in the FX9. In fact one of or club shooters just competed with one in his fx9 last weekend
Where were you able to order it through?Thank you guys . I took your advice and went with gentle recoil system can’t wait to put all together.