Backfire, if you are interested in a 39a check out this forum:http://www.rimfirecentral.com/forums/forumdisplay.php?f=269
There is a wealth of knowledge and access to information for every fix imaginable for this rifle. I picked up an older model, 1957, from a GunNutz forum member this past fall. It is a fine .22. The newer ones, some not all, do have some issues most of which are fixable with a little work and possibly some replacement parts. There is some concern being expressed with the purchase of Marlin by Remington and the closing of the New Haven facility.
Good luck;
Earl