I have a uniden antenna that came with a pro-510axl radio that is missing
the top half. Does anyone one else have this antenna? How would I get a
replacement part?

Is this a normal mobile rig or a useless handheld unit?

For a mobile radio, get a Wilson 1000. Don't complain that you hear engine noise
in this radio when the motor is on. We know it's going to happen with this radio.

All my AM only units had motor noise problems. It went away when I got my
first real CB, a PC-122 sideband unit. Since then, I've only used SSB units and
no longer have engine noise problems. YMMV.

-Scott, from the land of the 3.