FN TSR XPs will have the MOA trigger. Easiest way to tell without disassembly is look at the striker engagement with the sear. If the knotch on the striker is square, you have an MOA trigger. If it is angled, you have the older-style Two Lever trigger found on older M-70s, SPRs and PBRs.
Another dead give-away is the bolt stop/release lever. If the top of the bolt release lever is serrated, it has an MOA trigger. Older M-70s and SPRs will have a smooth and rounded bolt release lever with their Two Lever triggers.
Most aftermarket trigger makers have a Two Lever replacement because it is decades old and is in hundreds of thousands of M70s. Because the MOA trigger is relatively new, there are fewer aftermarket replacements. Make sure you specifically ask for an MOA replacement. If the trigger maker does not know what you are talking about, they only have the Two Lever replacement. The two are not interchangeable nor easily convertible.
The MOA trigger is not a bad trigger. Adjustable for weight, take-up and over travel. However, it will not adjust down beyond about 3 pounds. This is by design. If you need a lighter trigger than that, a replacement is the answer. As for the classic Two Lever trigger, it will adjust down quite easily to around two pounds. A good gunsmith with experience with a two lever can get lighter and still be safe. It is simple, robust and easy to adjust because you can see what you are doing. The MOA is a sealed unit with three levers common on many triggers today. If you are unsure of what you are doing on any trigger, you should leave it to a experienced gunsmith.
Hope this helps.
