Absolutely you CAN do that.
I am sitting here looking at the SAMS CB Photofact on that radio and here is what the radio has:

pin 1 - mic audio
pin 2 - radio ground
pin 3 - relay activation (ground it to transmit, open it to receive)

THAT is the way that the radio mic socket is wired.

Most microphones these days have 4 or 5 wires.

The 4 wires usually have
mic audio,
RX,
TX,
shared shield

The 5 wires typically have
mic audio
mic shield
RX
TX
switching shield

with almost any of these mics the switch inside is NORMALLY connecting the shield and RX pin. When you press the switch it opens the RX pin and connects the shield to the TX pin.

If you can identify that on most any mic you have you are most of the way home.

IN THE END, you will need to identify the
mic audio wire, and
the TX wire

then find a 3 pin female mic connector and connect the mic audio to pin 1, and the TX wire to pin 3.

From there it depends on your mic.

If it is 4 pin you need to find the one shield wire and use that as your ground and connect it to pin 2 on your female mic connector.

If it is a 5 pin you need to find both the mic audio shield AND the switching shield, wrap them together and connect them both to pin 2 on your female mic connector.

Any wires left, leave them cleanly cut and tape or otherwise fix them up where they won't get into any trouble and out your mic connector shell the rest of the way together.

Should be good to go.

The radio uses relay switching instead of electronic switching like newer radios.

To make it transmit you have to wire the mic so that, when you press PTT you connect pin 3 to pin 2 and when you let go it reverts to PTT.

The mic audio line needs to be referenced to the same ground and that is why, on a 5 pin mic, you have to tie the two ground together and connect them BOTH to pin 2. On a 4 wire mic they already ARE the same ground so you don't have to tie any wires together.

Good luck and, if you have any more questions let me know!

Bob