Through reading I have found out that the BD 106s have the "fix" on the feed ramp. I just picked up my 106 from my lgs. The serial is BD46XXXX, I was relieved then after looking up date codes It shows that it was made in 2006. A year before they were making the AB rifles? Anyone want to chime in, I have been googling but this question goes unanswered on threads.

I called Arsenal and inquired about an AB 47 serial number on a rifle I am buying, I was told that this particular gun was built/imported in early 2013 and that the prefix doesn't necessarily show what year the rifle was manufactured like most internet information you read. This may have been true about serial numbers on Bulgarian 80's/90's kits but Arsenal said this isn't accurate for identifying current production.

Threads on the 106 serial number prefix were abundant on the forums back when these were guns were new to the market.   I found one from six years ago.  Because it was from another forum, I sent the link to you on IM.  (I don't think we're allowed to post links to other forum boards).