Thanks for the warm welcome here! I am getting ready to fabricate the inner mag tube for my SN S445 39 and wondered in anyone has done this. I have the original outside tube that uses the push button release. Everyone (most) are suggesting I go to the late model mag but I want the original mag on this gun. Any mag parts of this type out there? I can make most everything but anything would be a help. As I said I only have the outer slide-off mag tube. No latch, barrel mount, follower or spring which the spring is no problem. Thanks!