Also note that simply because a given lower receiver has a "pre-ban" serial
number does not necessarily mean that the firearm was assembled prior to the
ban, only that the receiver was manufactured before the effective date of
the ban. In order for an assault weapon to be "grandfathered", it must have
been configured as an assault weapon prior to the ban (the effective date of
the ban was September 13, 1994.) If a stripped lower receiver was in a dealer's
bound book at the time the ban took effect, and it is later discovered in an
assault weapon configuration, it could be rather easily ascertained that it
is not a grandfathered firearm. Receivers in private hands on the day of
the ban are a little more ambiguous as who is to say if it was or was not in
an assault weapon configuration on the date of the ban, and then later stripped?
As always, buyer beware.
Here is a good site to check out status
http://home1.gte.net/bblakley/ban/
RON