I found an arrow awhile back that really fly's nice out of my recurve.  There is no markings on it but it takes an X nock and appears to have a hit insert.  Would this arrow be either a Beeman MFX or Axis?    Any way I can deter man the spine.

if you have a scale, you can weigh it and measure the length. Then look online at the gpi and figure out which shaft you have.

I tried that but it was tuff.  Problem is I think it might have a brass hit insert.  Plus it is footed.

Strip it and bareshaft it and see how it flys.Hard to tell if someone has removed the makings.You could weigh it and that may help deteremine which shaft it is.

What about measuring the outside diameter of the shaft?

DDave

The spine, rather than the manufacturer, is really what you need.  Find someone with a spine tester and measure the spine, then measure the o.d.  Then, of course, you'll need to find an arrow with the same static spine and o.d., cut it to length and then figure out the tip weight (including insert) of the one you have now.  Here's where you want to weigh both arrows.  Subtract the weight of the new arrow (including nock and fletchings) from the weight of the old arrow and you should have the weight of the tip and insert.  Install tip and insert of that weight.  Fletch it, install a nock and there you go!  Nothing to it.  Shouldn't take more than a week or so!!