Looking at the page for gun abbreviations it seems like there are a lot of abbreviations which are unnecessarily on there and clutter up the page, for example "93R, SSG69, PMM" and other abbrievations for one specific gun are on there and I believe it is redundant and those abbrievations can be explained if necessary on its own guns page. In my opinion it makes the site look as if it is not well moderated and makes it tedious to scroll through for proper abbrievations which do not just describe a single gun.
http://www.imfdb.org/wiki/List_of_gun_abbreviations