In addition to the Gold Handle Type 2 Classic Phaser and the White Handle Type 2 Classic Phaser from the original series of Star Trek, Diamond Select have also produced TOS Black Handle Classic Phaser.
This is the original Star Trek 2-in-1 classic phaser design that includes a detachable Type-1 mini-hand phaser (pictured detached in the above image).
Released by Diamond Select under an official Star Trek license.
For maximum authenticity it’s a full-scale reproduction modeled after the initial Star Trek prop.
Features realistic beam lights, sound effects, and adjustable power settings.
To activate the sound, you must remove the plastic display tab and turn on the hand phaser. (This is done by clicking the far right dial forward toward the front of the pistol.) To trigger the lights, rotate the front dial forward.
Watch a (kind of odd and yet also slightly amusing) demonstration of this Classic Phaser prop replica:
Get it at the vendors below (prices vary):