I had an FX T12 400 for about a week. I sent it back to AOA and got the FX Royale 500 .25 cal. No problems with the T12 I just liked the Royale 500 better.
Royale 500 .25 cal
1. Much quiter
2. Side power adjuster
3. Longer barrel
4. Different stock
5. Side cocking lever
6. Larger air supply
7. Side safety
8. Decock ability
Both rifle have a very good trigger. The list you see above are the things I really like on the Royale that the T12 does not have. I'm glad I got the Royale even though it was more money. The list is in no particular order just as I remembered what I liked about the Royale. I was very surprised how much quiter the Royale was over the T12, big difference. I have since added a Neil Clague LDC. Its so quite, it makes you think something is wrong with the rifle. It is the ultimate quite rifle. The side cocking lever is really smooth where the bolt action on the T12 is a hard pull back. The T12 does not have a safety as most rifles do. To place the T12 on safe, the bolt is pulled back and locked into position. To fire, raise the bolt and push forward. I didn't care for this at all. The stock on the Royale is larger and has more of a square bottom on it. Shooting it from my tripod or benchrest top is very easy and it rides the bags really good. I have the wood stock as well as the synthetic.