The links I bought are stock links, and allow the round to load, absent the hammer. Just like yours. The links are still to long for proper headspace. About .041-.045, let us just round to 050 for ease of math. The hammer has nothing behind it, only the spring attached to the spur. You can see from the first picture, the hammer and FPE interface when the lever is at full extension, Then you can see when I pull back on the hammer a little more, to hyper-extend it, the gap represented in the photo is the distance I need to get the breach bolt lower tab to retract into the channel so the round in the carrier block will pass. Absent this manual extension of the hammer, the round will not clear. When looking at the links, at this jammed stage, you can take your fingers and close the "V" gap that remains in the contracted links, this is accomplished because the breach block will move still, taking the slack out and then allowing the round to clear.
My toughs are, and very uneducated, is that I can shorten the long front portion of the link and leave the short, rear portion alone. I need to model this to ensure the behavior is the same when the geometry is changed. My elementary thinking is that this should be sufficient. To test, we may take a link, figure out where the new pin hole should be in the link, and insert a bushing with an offset pinhole. We are talking less than a 1/16 of an inch, or .045-050 of an inch. But the machine shop will help with this. I hope!