M48A = Stamped magazine floor plate, this is the only alteration to the first model.
M48B = Stamped trigger guard* & magwell are a stamped and welded assembly, magazine floor plate, follower,
forward band, H-band. Bands are stamped, formed and welded. Branko's book also includes the butt plate in the
partial list provided as part of the model 'b'. but this is somewhat confusing since by it's nature, the cupped
butt plate is traditionally a stamped part.
* This is the most easily recognized and defining part since barrel bands are so commonly swapped around on
M48bo = 'bo' stands for bez oznake meaning unmarked or without markings. It has been said (including by me)
that this was done for political reasons. But, politically it seems rather pointless on a rifle only manufactured by
one country (Yugoslavia). That rather eliminates "plausible deniability" as an option. But on the practical side,
a service likely would not want weapons marked with insignia of a foreign nation. The "bo" also left a blank pallet
for another nation to apply their own crests and markings on a weapon not marked at Kragujevac.
Another thing is that a model bo may be a scrubbed and refinished M48 first model or purposely manufactured
in model B configuration from 1956. To date, no M48bo is known to have been verified in model A configuration.
On a final note, just for the record and not shown in these images, is that any Yugoslav refurbished rifle may have
been rendered as a "bo." In the case of German model 98s, plausible deniability as to the origins of a shipment
of weapons certainly could apply.
Stamped trigger guard on left from M48BO, milled trigger guard on right from M48.
Stamped trigger guard from M48BO.
Milled trigger guard from M48.
Milled magazine floor plate on left from M48, stamped magazine floor plate on right from M48BO.
Milled magazine floor plate from M48.
Stamped magazine floor plate from M48BO.
Stamped forward band on left from M48BO, milled forward band on right from M48.
Stamped forward band from M48BO. (Note Weld)
Milled forward band from M48.
Stamped follower on left from M48BO, milled follower on right from M48.
Milled follower from M48.
Stamped follower from M48BO.
(I just rearranged the pics. I saved the original data so if this doesn't work, I can put it back. 'nug)
New as of 2/10/2011