I'm looking at getting into the long range hunting thing and am looking at a custom rifle but really don't know enough about to make a decision. The owner brought it by today and it is a complete custom job but I could not validate a few things and I am hoping some of you can help. The first thing is the action. It is a Mauser style action stamped FN on the left side. There is no safety installed and I don't know if one can be installed. From the internet it looks like it may be a JC Higgins model 50??? but it is not marked other than the FN. I also read that this may not support the use of the 338 LM. Any thoughts? The barrel is huge with an integral brake that may or may not be removable. He indicated that the barrel was made by Dillon although once again I could not verify this info. No iron sights. And I cannot find any info on Dillon barrels beyond pistol barrels. Thoughts? The stock is McMillan with a double set trigger and no detachable box magazine. Can the bottom metal be changed to support a detachable magazine or are the McMillan stocks just not modifiable? No sling mounts on the stock either. Don't know who made the triggers. My first post so be gentle.