The possible 'bugger' as in the takedown mechanism. It's good and adjustable, but still, needing reasonable care. Most rifles I believe factually seldom dismantled in that context. But if allowed to shoot as worn loose or (more suceptible to damage) poorly treated, a problem. They're simply not as sturdy. For me, I'll take the 94 regular carbine genre from about '32-'37 year production span. The sweet combo of barrel integral ramp and carbine stock with substantial wrap over the top butt plate. The 55 is a nice gun. Mine one of the 'poorer models as noted barrel threaded. A 'utility gun' in my parlance. Yet my above described 94, as amply noted, subject to receiver bluing difficulties due to the nickel steel alloy.
Ever remaining, too many nice guns, too little time! JUst maybe to sit back and enjoy with ample "pontificating" here and on Gunboards Forum!
Captive audience & my style!
Best!
John